SGM3837 [SGMICRO]
Triple-Output 600mA AMOLED Display Power Supply;
| 型号： | SGM3837 |
| 厂家： | 
Shengbang Microelectronics Co, Ltd |
| 描述： | Triple-Output 600mA AMOLED Display Power Supply |
| 文件： | 总19页 (文件大小：1443K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SGM3837
Triple-Output 600mA
AMOLED Display Power Supply
-4.0V Default Output Voltage
-600mA Output Current Capability
(VELVSS = -1.0V to -5.4V)
GENERAL DESCRIPTION
The SGM3837 is designed for powering AMOLED
(Active Matrix Organic LED) displays which require
● Synchronous Boost Converter (AVDD)
7.1V to 7.8V Output Voltage (SET = Low)
VELVDD, VELVSS and VAVDD. The device integrates two
Boost converters, VO1 for VELVDD and VO3 for VAVDD
and one inverting Buck-Boost converter VO2 for VELVSS
Output voltages of all the three converters can be
programmed in digital steps through the digital interface
control pins (ASWIRE & ESWIRE).
,
6.9V to 7.9V Output Voltage (SET = High)
.
7.6V Default Output Voltage
150mA Output Current Capability
● Selectable ASWIRE Setting via SET pin
● VIN and VOUT Bi-Directional Isolation
● Short Circuit Protection (SCP)
The SGM3837 is available in a Green WLCSP-2.0×
2.0-25B package.
● Overload Protection
● Thermal Shutdown
● VELVSS Start-Up Delay: 10.4ms
● Short Circuit and OLP Detection Time: 0.08ms
● Available in a Green WLCSP-2.0×2.0-25B Package
FEATURES
● 2.9V to 5.0V Input Supply Voltage Range
● Synchronous Boost Converter (ELVDD)
4.6V to 5.0V Output Voltage with 100mV Steps
4.6V Default Output Voltage
APPLICATIONS
Smartphone & Tablet
600mA Output Current Capability
● Synchronous Inverting Buck-Boost Converter
(ELVSS)
Active Matrix OLED Display
-6.6V to -1.0V Output Voltage with 100mV Steps
TYPICAL APPLICATION
D2, E2, E3
B1, C1, C2
VELVDD
4.6V ~ 5.0V
4.7μH
VO1
V
IN = 2.9V to 5.0V
D1, E1
SW1
Boost
VO1
22μF×2
22μF
PGND1
A5, B4, B5
C4, C5, D5
PVIN
SW2
Inverter
VO2
D4, E4, E5
B2
22μF
VELVSS
-1.0V ~ -6.6V
2.2μH
10μH
VO2
22μF×2
22μF
PGND2
Boost
VO3
A1
A2
VO3
VAVDD
SW3
22μF
A4
C3
D3
B3
AVIN
Internal
Analog
/Digital
Block
ASWIRE
ESWIRE
ASWIRE
ESWIRE
SET
A3
AGND
SGM3837
Figure 1. Typical Application Circuit
SG Micro Corp
www.sg-micro.com
JULY 2022– REV. A
Triple-Output 600mA
SGM3837
AMOLED Display Power Supply
PACKAGE/ORDERING INFORMATION
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
DESCRIPTION
ORDERING
NUMBER
PACKAGE
MARKING
PACKING
OPTION
MODEL
3837
SGM3837 WLCSP-2.0×2.0-25B
SGM3837YG/TR
XXXXX
XX#XX
Tape and Reel, 3000
-40℃ to +85℃
MARKING INFORMATION
NOTE: XXXXX = Date Code, Trace Code and Vendor Code. XX#XX = Coordinate Information and Wafer ID Number.
Date Code - Year
Trace Code
Vendor Code
X X X X X
XX＃XX
Coordinate Information
Wafer ID Number ("A" = 01, "B" = 02, …"Y" = 25)
Coordinate Information
Green (RoHS & HSF): SG Micro Corp defines "Green" to mean Pb-Free (RoHS compatible) and free of halogen substances. If
you have additional comments or questions, please contact your SGMICRO representative directly.
OVERSTRESS CAUTION
ABSOLUTE MAXIMUM RATINGS
Voltage Range (with Respect to Ground Pin)
Stresses beyond those listed in Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to
absolute maximum rating conditions for extended periods
may affect reliability. Functional operation of the device at any
conditions beyond those indicated in the Recommended
Operating Conditions section is not implied.
AVIN, PVIN, VO1, ASWIRE, SET, ESWIRE, SW1
........................................................................... -0.3V to 6V
VO2.................................................................... -7V to 0.3V
VO3, SW3........................................................ -0.3V to 11V
SW2...................................................................... -7V to 6V
PGND1, PGND2 to AGND................................ -0.3V to 0.3V
Package Thermal Resistance
ESD SENSITIVITY CAUTION
WLCSP-2.0×2.0-25B, θJA .......................................... 81℃/W
Junction Temperature.................................................+150℃
Storage Temperature Range.......................-65℃ to +150℃
Lead Temperature (Soldering, 10s)............................+260℃
ESD Susceptibility
This integrated circuit can be damaged if ESD protections are
not considered carefully. SGMICRO recommends that all
integrated circuits be handled with appropriate precautions.
Failureto observe proper handlingand installation procedures
can cause damage. ESD damage can range from subtle
performance degradation tocomplete device failure. Precision
integrated circuits may be more susceptible to damage
because even small parametric changes could cause the
device not to meet the published specifications.
HBM.............................................................................3000V
CDM ............................................................................1000V
RECOMMENDED OPERATING CONDITIONS
Operating Ambient Temperature Range ........-40℃ to +85℃
Operating Junction Temperature Range......-40℃ to +125℃
DISCLAIMER
SG Micro Corp reserves the right to make any change in
circuit design, or specifications without prior notice.
SG Micro Corp
www.sg-micro.com
JULY 2022
2
Triple-Output 600mA
SGM3837
AMOLED Display Power Supply
PIN CONFIGURATION
(TOP VIEW)
1
2
3
4
5
VO3
SW3
AGND
AVIN
PVIN
A
PGND1
PGND1
SW1
PGND2
PGND1
VO1
SET
ASWIRE
ESWIRE
VO1
PVIN
SW2
VO2
VO2
PVIN
SW2
SW2
VO2
B
C
D
E
SW1
VO1
WLCSP-2.0×2.0-25B
PIN DESCRIPTION
PIN
A1
NAME
VO3
TYPE
DESCRIPTION
O
G
I/O
I/O
G
O
G
I
VO3 Boost Converter Output.
B1, C1, C2
D1, E1
A2
PGND1
SW1
VO1 Boost Converter Power Ground.
VO1 Boost Converter Switching Node.
SW3
VO3 Boost Converter Switching Node.
B2
PGND2
VO1
VO2 Inverting Buck-Boost Converter and VO3 Boost Converter Power Ground.
VO1 Boost Converter Output.
D2, E2, E3
A3
AGND
SET
Analog Ground Pin.
B3
VO3 Output Voltage Table Setting Pin.
C3
ASWIRE
ESWIRE
AVIN
I
VO3 Boost Converter Enable Control and Programming Pin.
VO1 Boost Converter and VO2 Inverting Buck-Boost Converter Enable Control and
Programming Pin.
D3
I
A4
I
Analog Input Supply Pin.
B4, A5, B5
C4, C5, D5
D4, E4, E5
PVIN
I
Power Input Supply Pin.
SW2
I/O
O
VO2 Inverting Buck-Boost Converter Switching Node.
VO2 Inverting Buck-Boost Converter Output.
VO2
NOTE: I: input, O: output, I/O: input or output, G: ground.
SG Micro Corp
www.sg-micro.com
JULY 2022
3
Triple-Output 600mA
SGM3837
AMOLED Display Power Supply
ELECTRICAL CHARACTERISTICS
(At TA = TJ = +25℃, VAVIN = VPVIN = VIN = 3.7V, VESWIRE = VASWIRE = VAVIN, VVO1 = 4.6V, VVO2 = -4.0V, VVO3 = 7.6V, unless otherwise
noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
Supply Current and Thermal Protection
AVIN, PVIN Input Voltage Range
AVIN Start Threshold Voltage
AVIN Stop Threshold Voltage
VS_VIN
VSTART
VSTOP
2.9
5.0
V
V
V
VAVIN rising
VAVIN falling
2.27
2.10
2.35
2.15
2.40
2.23
VIN = 4.5V, VASWIRE = 0V, VESWIRE = 0V (sum of IAVIN
and IPVIN
AVIN, PVIN Supply Current when Disabled
AVIN, PVIN Supply Current
ISD_VIN
IQ
0.3
1.0
1.5
μA
)
No switching
1.1
4
mA
No load, VASWIRE = VESWIRE = High
1.45
MHz
%
Switching Frequency
fSW
-10
10
Thermal Shutdown Temperature
TSD
Temperature rising
145
4.6
℃
Boost Converter (VVO1 = VELVDD
)
Positive Output 1 Voltage
VVO1
4.6
-0.5
-0.8
2.0
5.0
0.5
0.8
2.4
V
VVO1 = 4.6V, no load
Positive Output 1 Voltage Variation
%
VVO1 = 4.6V, no load, TJ = -40℃ to +85℃
Inductor peak current
SW1 Current Limit
ISW1_LIM
IO1_MAX
2.2
A
mA
Ω
Maximum Output Current
SW1 Low-side TR On-Resistance
SW1 High-side TR On-Resistance
VO1 Short Circuit Protection
Discharging Resistance
Line Regulation
VIN = 2.9V to 5.0V
600
RDSON_SW1L ISW1 = 0.2A
RDSON_SW1H ISW1 = 0.2A
0.20
0.13
0.30
0.20
Ω
VO1_SCP
VVO1 falling, 80μs delay latch
0.87 × VVO1
140
V
RDCHG_VO1
Ω
VO1LINEREG IVO1 = 100mA, VIN = 2.9V to 5.0V
VO1LOADREG 1mA ≤ IVO1 ≤ 600mA
±0.006
±0.2
%/V
%/A
Load Regulation
Buck-Boost Converter (VVO2 = VELVSS
)
Negative Output Voltage
VVO2
-6.6
-25
-40
2.6
-4.0
3.3
-1.0
25
V
VVO2 = -4V, no load
Negative Output Voltage Variation
mV
40
VVO2 = -4V, no load, TJ = -40℃ to +85℃
SW2 Current Limit
ISW2_LIM
IO2_MAX
Inductor peak current
VIN = 2.9V to 5.0V
4.0
A
mA
Ω
Maximum Output Current
SW2 Low-side TR On-Resistance
SW2 High-side TR On-Resistance
VO2 Short Circuit Protection
Discharging Resistance
Line Regulation
-600
0.10
0.30
RDSON_SW2L ISW2 = 0.2A
0.07
0.18
RDSON_SW2H ISW2 = 0.2A
Ω
VVO2_SCP VVO2 rising, 80μs delay latch
RDCHG_VO2
0.89 × VVO2
160
V
Ω
VO2LINEREG IVO2 = 100mA, VIN = 2.9V to 5.0V
VO2LOADREG 1mA ≤ IVO2 ≤ 600mA
±0.003
±0.2
%/V
%/A
Load Regulation
Boost Converter (VVO3 = VAVDD
)
SET = Low (GND)
VVO3
7.1
6.9
7.6
7.6
7.8
7.9
V
V
Positive Output 2 Voltage
SET = High (VIN)
V
VO3 = 7.6V, no load
-0.8
-1.2
0.75
150
0.8
Positive Output 2 Voltage Variation
%
1.2
VVO3 = 7.6V, no load, TJ = -40℃ to +85℃
Inductor peak current
SW3 Current Limit
ISW3_LIM
IO3_MAX
1.05
1.35
A
Maximum Output Current
VIN = 2.9V to 5.0V
mA
SG Micro Corp
www.sg-micro.com
JULY 2022
4
Triple-Output 600mA
SGM3837
AMOLED Display Power Supply
ELECTRICAL CHARACTERISTICS (continued)
(At TA = TJ = +25℃, VAVIN = VPVIN = VIN = 3.7V, VESWIRE = VASWIRE = VAVIN, VVO1 = 4.6V, VVO2 = -4.0V, VVO3 = 7.6V, unless otherwise
noted.)
PARAMETER
SW3 Low-side TR On-Resistance
SW3 High-side TR On-Resistance
VO3 Short Circuit Protection
Discharging Resistance
Line Regulation
SYMBOL
CONDITIONS
MIN
TYP
0.38
MAX UNITS
RDSON_SW3L ISW3 = 0.1A
RDSON_SW3H ISW3 = 0.1A
0.5
1.5
Ω
Ω
1.1
VVO3_SCP VVO3 falling, 1ms delay latch
RDCHG_VO3
0.87 × VVO3
250
V
Ω
VO3LINEREG IVO3 = 50mA, VIN = 2.9V to 5.0V
VO3LOADREG 1mA ≤ IVO3 ≤ 150mA
±0.009
±0.7
%/V
%/A
Load Regulation
ESWIRE
ESWIRE Input High Threshold Voltage
ESWIRE Input Low Threshold Voltage
ESWIRE High Time (1)
VESWIREH
VESWIREL
tESH
1.1
V
V
VIN = 2.9V to 5.0V, TJ = -40℃ to +85℃
VIN = 2.9V to 5.0V, TJ = -40℃ to +85℃
0.4
20
20
2
2
10
10
μs
μs
ESWIRE Low Time (1)
tESL
ASWIRE
ASWIRE Input High Threshold Voltage
ASWIRE Input Low Threshold Voltage
ASWIRE High Time (1)
VASWIREH
VASWIREL
tASH
1.1
V
V
VIN = 2.9V to 5.0V, TJ = -40℃ to +85℃
VIN = 2.9V to 5.0V, TJ = -40℃ to +85℃
0.4
20
20
2
2
10
10
μs
μs
ASWIRE Low Time (1)
tASL
NOTE:
1. Guaranteed by design. Not production tested.
SG Micro Corp
www.sg-micro.com
JULY 2022
5
Triple-Output 600mA
SGM3837
AMOLED Display Power Supply
TIMING REQUIREMENTS
PARAMETER
Short-Circuit Timer
SYMBOL
MIN
TYP
MAX
UNITS
VO1 Short Circuit Detection Time in Start-Up
VO1 Short Circuit Detection Time in Operation
VO2 Short Circuit Detection Time in Start-Up
VO2 Short Circuit Detection Time in Operation
VO3 Short Circuit Detection Time in Start-Up
VO3 Short Circuit Detection Time in Operation
ESWIRE Interface
5.2
0.08
12
tVO1(SCP)
tVO2(SCP)
tVO3(SCP)
ms
0.08
1.2
1
Initialization Time
tINIT_E
tOFF_E
tH_E
400
35
2
Shutdown Time Period
45
10
10
45
55
20
20
55
Pulse High Level Time Period
Pulse Low Level Time Period
Data Storage/Accept Time Period
ASWIRE Interface
μs
μs
tL_E
2
tSTORE_E
35
Initialization Time
tINIT_A
tOFF_A
tH_A
400
35
2
Shutdown Time Period
45
10
10
45
55
20
20
55
Pulse High Level Time Period
Pulse Low Level Time Period
Data Storage/Accept Time Period
Power Sequence
tL_A
2
tSTORE_A
35
VO1 Start-Up Time
tSS1
tSS2
tDELAY
tSS3
1.6
1.6
8.4
2.6
10
VO2 Start-Up Time
VO2 Start-Up Time Delay after VO1
VO3 Start-Up Time
ms
VOx Discharge Time after ASWIRE or ESWIRE Goes Low
tDISCHG
VIN
tL_E tH_E
tSTORE_E
tOFF_E
tDISCHG
tINIT_E
tSS1
tDELAY
tSS2
ESWIRE
1
2
37
4.6V
VO1 (ELVDD)
-3.0V
VO2 (ELVSS)
-4.0V
Figure 2. Timing Diagram
SG Micro Corp
www.sg-micro.com
JULY 2022
6
Triple-Output 600mA
SGM3837
AMOLED Display Power Supply
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 3.7V, unless otherwise noted.
VO1 and VO2 Combined Efficiency vs. Output Current
VO3 Efficiency vs. Output Current
100
80
60
40
20
0
100
80
60
40
20
0
— VIN = 2.9V
— VIN = 3.7V
— VIN = 4.2V
— VIN = 5.0V
— VIN = 2.9V
— VIN = 3.7V
— VIN = 4.2V
— VIN = 5.0V
VVO3 = 7.6V
VVO1 = 4.6V, VVO2 = -4.0V
0
100 200 300 400 500 600 700 800
Output Current (mA)
0
0
0
20 40 60 80 100 120 140 160 180
Output Current (mA)
VVO1 Line Regulation
VVO1 Load Regulation
4.612
4.609
4.606
4.603
4.600
4.597
4.594
4.591
4.612
4.609
4.606
4.603
4.600
4.597
4.594
4.591
— VIN = 2.9V
— VIN = 3.7V
— VIN = 4.5V
— VIN = 5.0V
— IOUT = 1mA
— IOUT = 10mA
— IOUT = 100mA
— IOUT = 600mA
VVO1 = 4.6V
VVO1 = 4.6V
2.9
3.2
3.5
3.8
4.1
4.4 4.7 5.0
100 200 300 400 500 600 700 800
Output Current (mA)
Input Voltage (V)
VVO2 Line Regulation
VVO2 Load Regulation
-3.998
-4.000
-4.002
-4.004
-4.006
-4.008
-4.010
-4.012
-3.984
-3.986
-3.988
-3.990
-3.992
-3.994
-3.996
— VIN = 2.9V
— VIN = 3.7V
— VIN = 4.5V
— IOUT = 1mA
— IOUT = 10mA
— IOUT = 100mA
— IOUT = 600mA
— VIN = 5.0V
VVO2 = -4.0V
VVO2 = -4.0V
2.9
3.2
3.5
3.8
4.1
4.4
4.7
5.0
100 200 300 400 500 600 700 800
Output Current (mA)
Input Voltage (V)
SG Micro Corp
JULY 2022
www.sg-micro.com
7
Triple-Output 600mA
SGM3837
AMOLED Display Power Supply
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 3.7V, unless otherwise noted.
VVO3 Line Regulation
VVO3 Load Regulation
7.628
7.625
7.622
7.619
7.616
7.613
7.610
7.628
7.625
7.622
7.619
7.616
7.613
7.610
— VIN = 2.9V
— VIN = 3.7V
— VIN = 4.5V
— VIN = 5.0V
— IOUT = 1mA
— IOUT = 10mA
— IOUT = 50mA
— IOUT = 150mA
VVO3 = 7.6V
3.2 3.5
VVO3 = 7.6V
2.9
3.8
4.1
4.4
4.7
5.0
0
20 40 60 80 100 120 140 160 180
Output Current (mA)
Input Voltage (V)
VO1 and VO2 Combined Maximum Output Current vs. Input Voltage
1400
VO3 Maximum Output Current vs. Input Voltage
500
400
300
200
100
0
1200
1000
800
600
— VVO1 = 4.6V, VVO2 = -1.0V
— VVO1 = 4.6V, VVO2 = -2.4V
— VVO1 = 4.6V, VVO2 = -4.0V
— VVO1 = 4.6V, VVO2 = -5.4V
— VVO1 = 4.6V, VVO2 = -6.0V
— VVO1 = 4.6V, VVO2 = -6.6V
400
200
0
— VVO3 = 6.9V
— VVO3 = 7.6V
2.9
3.2
3.5
3.8
4.1
4.4
4.7
5.0
2.9
3.2
3.5
3.8
4.1
4.4
4.7
5.0
Input Voltage (V)
Input Voltage (V)
Start-Up Sequence
Shutdown Sequence Discharge = ON
VIN
5V/div
VIN
ASWIRE
ESWIRE
5V/div
5V/div
5V/div
5V/div
5V/div
5V/div
ASWIRE
ESWIRE
VO3
VO1
VO3
VO1
5V/div
5V/div
5V/div
5V/div
VO2
5V/div
VO2
IIN
200mA/
div
VIN = 3.7V, VASWIRE = VESWIRE = 3V to 0V,
VVO1 = 4.6V, VVO2 = -4.0V, VVO3 = 7.6V, ILOAD = 0mA
VIN = 3.7V, VASWIRE = 0V to 3V, VESWIRE = 0V to 3V,
V
VO1 = 4.6V, VVO2 = -4.0V, VVO3 = 7.6V, ILOAD = 0mA
Time (5ms/div)
Time (5ms/div)
SG Micro Corp
www.sg-micro.com
JULY 2022
8
Triple-Output 600mA
SGM3837
AMOLED Display Power Supply
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 3.7V, unless otherwise noted.
Shutdown Sequence Discharge = OFF
VO1 Output Ripple at 10mA Load
VIN
5V/div
SW1
2V/div
ASWIRE
5V/div
5V/div
ESWIRE
VO3
5V/div
5V/div
VO1
AC Coupled
VO1
IL1
5mV/
div
5V/div
VO2
200mA/
div
VIN = 3.7V, VASWIRE = VESWIRE = 3V to 0V,
VVO1 = 4.6V, VVO2 = -4.0V, VVO3 = 7.6V, ILOAD = 0mA
VIN = 3.7V, VVO1 = 4.6V, VVO2 = -4.0V, VVO3 = 7.6V,
IVO1 = 10mA, IVO2 = -10mA, IVO3 = 0mA
Time (1s/div)
Time (300ns/div)
VO1 Output Ripple at 100mA Load
VO2 Output Ripple at -10mA Load
2V/div
SW1
SW2
VO2
IL2
2V/div
AC Coupled
AC Coupled
5mV/
div
VO1
IL1
5mV/
div
200mA/
div
200mA/
div
VIN = 3.7V, VVO1 = 4.6V, VVO2 = -4.0V, VVO3 = 7.6V,
IVO1 = 100mA, IVO2 = -100mA, IVO3 = 0mA
VIN = 3.7V, VVO1 = 4.6V, VVO2 = -4.0V, VVO3 = 7.6V,
IVO1 = 10mA, IVO2 = -10mA, IVO3 = 0mA
Time (300ns/div)
Time (300ns/div)
VO2 Output Ripple at -100mA Load
VO3 Output Ripple at 100mA Load
SW3
VO3
5V/div
AC Coupled
10mV/
div
SW2
VO2
2V/div
AC Coupled
5mV/
div
IL2
200mA/
div
500mA/
div
IL3
VIN = 3.7V, VVO1 = 4.6V, VVO2 = -4.0V, VVO3 = 7.6V,
VIN = 3.7V, VVO1 = 4.6V, VVO2 = -4.0V, VVO3 = 7.6V,
IVO1 = 100mA, IVO2 = -100mA, IVO3 = 0mA
IVO1 = 0mA, IVO2 = 0mA, IVO3 = 100mA
Time (300ns/div)
Time (300ns/div)
SG Micro Corp
www.sg-micro.com
JULY 2022
9
Triple-Output 600mA
SGM3837
AMOLED Display Power Supply
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 3.7V, unless otherwise noted.
Line Transient at No Load
Line Transient at Light Load
VIN
500mV/
div
500mV/
div
VIN
AC Coupled
AC Coupled
AC Coupled
10mV/
div
VO1
VO2
VO3
VO1
5mV/
div
AC Coupled
AC Coupled
10mV/
div
VO2
VO3
5mV/
div
AC Coupled
20mV/
div
5mV/
div
VIN = 3.7V to 4.2V, VVO1 = 4.6V, VVO2 = -4.0V, VVO3 = 7.6V,
VIN = 3.7V to 4.2V, VVO1 = 4.6V, VVO2 = -4.0V, VVO3 = 7.6V,
I
VO1 = 0mA, IVO2 = 0mA, IVO3 = 0mA
I
VO1 = 10mA, IVO2 = -10mA, IVO3 = 10mA
Time (100μs/div)
Time (50μs/div)
Line Transient at Heavy Load
VO1 and VO2 Load Transient
AC Coupled
AC Coupled
50mV/
div
500mV/
div
VO1
VO2
VIN
AC Coupled
AC Coupled
50mV/
div
VO1
100mV/
div
20mV/
div
VO2
VO3
AC Coupled
50mV/
div
200mA/
div
ILOAD
VIN = 3.7V to 4.2V, VVO1 = 4.6V, VVO2 = -4.0V, VVO3 = 7.6V,
IVO1 = 500mA, IVO2 = -500mA, IVO3 = 150mA
VIN = 3.7V, VVO1 = 4.6V, VVO2 = -4.0V,
ILOADVO1&VO2 = 10mA to 300mA
Time (50μs/div)
VO3 Load Transient
AC Coupled
Time (100μs/div)
VO3
100mV/
div
ILOAD
50mA/
div
VIN = 3.7V, VVO3 = 7.6V, ILOADVO3 = 10mA to 100mA
Time (100μs/div)
SG Micro Corp
www.sg-micro.com
JULY 2022
10
Triple-Output 600mA
SGM3837
AMOLED Display Power Supply
FUNCTIONAL BLOCK DIAGRAM
PGND1
SW1
VO1
PGND2
SW3
VO3
AVIN
UVLO
&
Reference
AGND
VO1 Controller
VO3 Controller
ESWIRE
ASWIRE
ELVDD
ELVSS
AVDD
Control Logic
&
OTP
VO1 VO2 VO3
Fast Discharge
SET
VO2 Controller
VO1 VO2 VO3
Short Circuit Protection
Oscillator
PVIN
SW2
VO2
Figure 3. Functional Block Diagram
RECOMMENDED COMPONENT SELECTION
Table 1. Recommended Component Selection
Converter
Component
CIN1
Value
22μF
22μF
4.7μH
22μF
22μF
2.2μH
22μF
22μF
10μH
Number
Electrical Spec
X5R, 10V, 0603
Part Number
Manufacturer
Murata
1
2
1
1
2
1
1
1
1
GRM188R61A226ME15D
GRM188R61A226ME15D
HTEH25201T-4R7MSR
GRM188R61A226ME15D
GRM188R61A226ME15D
HMLQ25201T-2R2MSR
GRM188R61A226ME15D
GRM188R61A226ME15D
SDEM25201B-100MS
ELVDD
CVO1
X5R, 10V, 0603
Murata
LVO1
1.9A, 100mΩ, 252010
X5R, 10V, 0603
Cyntec
CPVIN
CVO2
Murata
ELVSS
AVDD
X5R, 10V, 0603
Murata
LVO2
3.4A, 89mΩ, 252010
X5R, 10V, 0603
Cyntec
CIN3
Murata
CVO3
X5R, 10V, 0603
Murata
LVO3
0.9A, 390mΩ, 252012
Cyntec
NOTE: The minimum value of the required capacitor for 600mA load at VVO1 = 4.6V or VVO2 = -4.0V is 13.2μF and for 150mA load
at VVO3 = 7.9V is 3.9μF.
SG Micro Corp
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JULY 2022
11
Triple-Output 600mA
SGM3837
AMOLED Display Power Supply
DETAILED DESCRIPTION
with 100mV steps through ESWIRE pin (see Table 2).
The output of VO2 is fully isolated in shutdown mode.
Under-Voltage Lockout (UVLO)
The built-in under-voltage lockout function (UVLO)
monitors the input voltage and disables the device
when the input voltage is too low to operate.
Boost Converter VO3 (AVDD)
The Boost converter VO3 operates with a peak-
current-mode topology and fixed 1.45MHz (TYP)
frequency. The VO3 output voltage can be
programmed through ASWIRE pin, and the output
voltage table can be changed by SET pin. When SET =
low, the VO3 voltage is available between 7.1V and
7.8V (default 7.6V) with 100mV steps. While SET =
high, the VO3 voltage is available between 6.9V and
7.9V (default 7.6V) with 50mV steps (see Table 3).
Thermal Shutdown (TSD)
The device has a function of thermal shutdown, which
prevents the device from damage due to overheating
and excessive power dissipation. The device is latched
and shuts down the outputs once the junction
temperature exceeds +145 ℃ (TYP). It resumes
operation after toggling ESWIRE and ASWIRE
simultaneously.
The output of VO3 is fully isolated in shutdown mode.
Start-Up Sequence
Pulling ASWIRE high enables the VO3 Boost converter.
Pulling ESWIRE high enables the VO1 Boost converter
and VO2 Buck-Boost converter. The VO2 always starts
10ms later than VO1 with a -4V default value. All
converters start with soft-start function to limit the
inrush current. Figure 4 shows the start-up sequence of
SGM3837.
Output Current Capacity
The device operates with an input voltage range of
2.9V to 5.0V. However, due to different input voltage
and different output voltage, the output current capacity
is quite different. A lower input voltage or a higher
output voltage leads to a lower output current capacity.
Input Power Supply
Boost Converter VO1 (ELVDD)
The input power supply voltage is recommended
between 2.9V and 5.0V. To achieve full performance, a
stable and noise-free input source is needed. Once the
distance between input source and SGM3837 is a bit
long, additional capacitors are suggested to place as
close to the device as possible. Please refer to the
typical application circuit for the suggested input
capacitance.
The Boost converter VO1 operates with peak-
current-mode topology and fixed 1.45MHz (TYP)
frequency. The VO1 output voltage can be
programmed between 4.6V and 5.0V (default 4.6V) with
100mV steps through ESWIRE pin (see Table 2).
The output of VO1 is fully isolated in shutdown mode.
Inverting Buck-Boost Converter VO2
(ELVSS)
The inverting Buck-Boost converter VO2 operates with a
peak-current-mode topology and fixed 1.45MHz (TYP)
frequency. The VO2 output voltage can be
programmed between -6.6V to -1.0V (default -4.0V)
SGMICRO has patented circuits to solve the spike
problem of VELVDD due to mode switching when the
input voltage rises close to or higher than the
programmed VELVDD
.
ASWIRE
ESWIRE
VO3 (AVDD)
VO1 (ELVDD)
10ms (TYP)
VO2 (ELVSS)
Figure 4. Start-Up Sequence
SG Micro Corp
www.sg-micro.com
JULY 2022
12
Triple-Output 600mA
SGM3837
AMOLED Display Power Supply
DETAILED DESCRIPTION (continued)
Table 2. Programming Table for VO1 and VO2 (ESWIRE)
ESWIRE
Pulse
VO2
(ELVSS)
ESWIRE
Pulse
VO2
(ELVSS)
ESWIRE
Pulse
VO2
(ELVSS)
ESWIRE
Pulse
VO1
(ELVDD)
0/no pulse
-4.0V
-6.6V
-6.5V
-6.4V
-6.3V
-6.2V
-6.1V
-6.0V
-5.9V
-5.8V
-5.7V
-5.6V
-5.5V
-5.4V
-5.3V
-5.2V
-5.1V
-5.0V
-4.9V
-4.8V
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
-4.7V
-4.6V
-4.5V
-4.4V
-4.3V
-4.2V
-4.1V
-4.0V
-3.9V
-3.8V
-3.7V
-3.6V
-3.5V
-3.4V
-3.3V
-3.2V
-3.1V
-3.0V
-2.9V
-2.8V
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
-2.7V
-2.6V
-2.5V
-2.4V
-2.3V
-2.2V
-2.1V
-2.0V
-1.9V
-1.8V
-1.7V
-1.6V
-1.5V
-1.4V
-1.3V
-1.2V
-1.1V
-1.0V
0/no pulse
4.6V
5.0
1
2
76
77
78
79
4.9
3
4.8
4
4.7
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Table 3. Programming Table for VO3 (ASWIRE)
SET = High
SET = Low
ASWIRE Pulse
AVDD
7.60V
7.90V
7.85V
7.80V
7.75V
7.70V
7.65V
7.60V
7.55V
7.50V
7.45V
ASWIRE Pulse
AVDD
ASWIRE Pulse
AVDD
7.60V
7.80V
7.70V
7.60V
7.50V
7.40V
7.30V
7.20V
7.10V
0/no pulse
11
12
13
14
15
16
17
18
19
20
21
7.40V
7.35V
7.30V
7.25V
7.20V
7.15V
7.10V
7.05V
7.00V
6.95V
6.90V
0/no pulse
1
2
1
2
3
4
5
6
7
8
3
4
5
6
7
8
9
10
Table 4. Fast Discharge (FD) Function Table (ASWIRE)
ASWIRE Pulse
SET = High
Default: FD Off
FD On
ASWIRE Pulse
SET = Low
No pulse
No pulse
Default: FD Off
FD On
25
26
11
12
FD Off
FD Off
SG Micro Corp
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JULY 2022
13
Triple-Output 600mA
SGM3837
AMOLED Display Power Supply
DETAILED DESCRIPTION (continued)
60μs in the default fast mode (see Figure 6). The
SGM3837 enters slow mode after 74 ESWIRE pulses.
The slow mode transition time is 16ms and VELVSS
regulates by 4 steps of 25mV in 16ms.
ASWIRE Interface (ASWIRE Pin)
The SGM3837 provides an ASWIRE pin to enable/
disable the VO3, and program the VO3 output voltage.
Figure 5 shows the timing.
After toggling ASWIRE high, the VO3 Boost converter
starts with a 7.6V default voltage. The output voltage of
VO3 can also be programmed through the ASWIRE
interface. The programming table is illustrated in Table 3.
ESWIRE Interface (ESWIRE Pin)
The positive output voltage VELVDD and the negative
output voltage VELVSS can be programmed through the
ESWIRE digital interface with 100mV steps.
Figure 7 shows an example for SGM3837 programming
VELVSS to -6.4V. The ESWIRE pin can be used as an
enable pin if programming is not required. The device
starts with the default values if enabled. The ESWIRE
interface counts the rising edges to set the
corresponding values. The device utilizes a volatile
memory to store the settings. See Table 2 for more
details.
Fast Discharge (FD)
The SGM3837 supports fast discharge which is
controlled by ASWIRE and SET pins. When power off
and the FD is on state, all outputs of the device are
discharged to GND. While the FD is off state, all
outputs remain Hi-Z status. Table 4 shows the
demands of the FD function.
ELVSS Transition Time Control
The SGM3837 provides ELVSS transition time control
function by ESWIRE command. The transition time is
tL_A
tH_A
tINIT_A
tSS3
tSTORE_A
tOFF_A
1
2
3
ASWIRE
7.8V (SET = High)
7.6V
VO3 (AVDD)
Figure 5. Timing of a Command Processing with the ASWIRE Interface
60μs (fast)
60μs (fast)
VELVSS
25mV
16ms
16ms
Figure 6. VELVSS Transition Time Control
tL_E
tH_E
tINIT_E
tSS1
tSTORE_E
tOFF_E
ESWIRE
1
2
3
4.6V
tSS2
VO1 (ELVDD)
VO2 (ELVSS)
-4.0V
-6.4V
Figure 7. Timing of a Command Processing with the ESWIRE Interface
SG Micro Corp
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JULY 2022
14
Triple-Output 600mA
SGM3837
AMOLED Display Power Supply
DETAILED DESCRIPTION (continued)
- VELVDD is not in regulation 5.2ms after VELVDD is
enabled (ESWIRE = high for longer than 5.2ms) then
all converters shut down.
Soft-Start, Discharge and Start-Up Sequence
The built-in soft-start function is adopted to limit the
inrush current. The output discharge function can be
controlled by both SET pin and ASWIRE interface.
- VELVSS is not in regulation 12ms after VELVSS is enabled
(ESWIRE = high for longer than 12ms) then ELVDD
and ELVSS converters shut down.
Toggling ESWIRE high or with relevant pulses enables
the VO1 Boost converter. VO1 starts with a 0.35A
soft-start current limit until it rises to the programmed
voltage. Then the full current limit is active (2.2A, TYP).
- VAVDD protection is enabled when the soft-start is
completed.
10ms after toggling ESWIRE high, the VO2 converter
starts with a -4V default voltage. Before VO2 rises to
the default voltage it rises linearly for 1.6ms. Then the
full current limit is active (3.3A, TYP).
- VELVDD falls below 87% of the programmed output
voltage longer than 80μs then all converters shut down.
- VELVSS rises above 89% of the programmed output
voltage longer than 80μs then all converters shut down.
Toggling ASWIRE high starts the VO3 Boost converter.
Before VO3 rises to the default value (7.6V), it rises
linearly for 1.6ms. Then the full current limit is active
(1.05A, TYP).
- VAVDD falls below 87% of the programmed output
voltage longer than 1ms then all converters shut down.
Device Reset
- Power resetting resets the device to default settings.
Overload and Short Circuit Protection (SCP)
The built-in short circuit protection (SCP) prevents the
device from damage. If any of the three outputs (VO1,
VO2 and VO3) is shorted to the ground or VO1 and
VO2 are shorted together, the SGM3837 will trigger the
function.
- Short circuit and overload protection reset all settings.
- Pulling ASWIRE high to enable the VAVDD converter
resets the output discharge.
- Pulling ASWIRE low for tOFF_A then VAVDD is reset to
default value of 7.6V.
When a short or an overload occurs, all the three
converters stop switching, the outputs are shut down
and latched.
- Pulling ESWIRE low for tOFF_E then VELVDD and VELVSS
are reset to default values of 4.6V and -4.0V
respectively.
Only resetting the power supply or pulling ASWIRE and
ESWIRE low at the same time for more than tOFF_A and
- Pulling ESWIRE low for tOFF_E then VELVSS transition
time is reset to default value of 60μs.
tOFF_E respectively can restart the device.
An SCP or overload occurs if any of the following
events happens:
- Pulling ASWIRE and ESWIRE low at the same time
for tOFF_A and tOFF_E respectively then short circuit
protection is reset.
SG Micro Corp
www.sg-micro.com
JULY 2022
15
Triple-Output 600mA
SGM3837
AMOLED Display Power Supply
DETAILED DESCRIPTION (continued)
6. It is recommended to use parallel capacitors to get
lower ESR.
Layout Guideline
AMOLED displays are sensitive to quality of power
supplies. A good PCB layout is quite important to
reduce the ripple and to enhance the line and load
transients, as well as to achieve better noise, better
EMI and loop stability. The recommended layout is
illustrated in Figure 8.
It is recommended to follow the below PCB layout
guidelines:
1. A common ground plane between analog ground
(AGND) and power ground (PGNDx) to minimize
ground shifts is recommended.
2. Traces of switching nodes (SW1, SW2 and SW3)
should be short and wide.
3. Place input capacitors on PVIN and output
capacitors on VO2 as close as possible to the device.
4. Place the output capacitors on VO1 and VO3 as
close as possible to the device.
Figure 8. PCB Layout Reference
5. Use short and wide traces to connect the input
capacitors on PVIN and the output capacitors.
REVISION HISTORY
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Original (JULY 2022) to REV.A
Page
Changed from product preview to production data.............................................................................................................................................All
SG Micro Corp
www.sg-micro.com
JULY 2022
16
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
WLCSP-2.0×2.0-25B
D
0.20
0.18
0.40
25 × Φ
A1 CORNER
E
0.40
TOP VIEW
RECOMMENDED LAND PATTERN (Unit: mm)
25 × Φd
5
3
2
1
4
A
B
C
D
E
C
A
e
SEATING PLANE
A1
ccc C
e
SIDE VIEW
BOTTOM VIEW
Dimensions In Millimeters
Symbol
MIN
MOD
0.620
MAX
0.665
0.210
2.030
2.030
0.250
A
A1
D
0.575
0.170
1.970
1.970
0.210
0.190
2.000
E
2.000
d
0.230
e
0.400 BSC
0.050
ccc
NOTE: This drawing is subject to change without notice.
SG Micro Corp
TX00254.001
www.sg-micro.com
PACKAGE INFORMATION
TAPE AND REEL INFORMATION
REEL DIMENSIONS
TAPE DIMENSIONS
P2
P0
W
Q2
Q4
Q2
Q4
Q2
Q4
Q1
Q3
Q1
Q3
Q1
Q3
B0
Reel Diameter
P1
A0
K0
Reel Width (W1)
DIRECTION OF FEED
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF TAPE AND REEL
Reel Width
Reel
Diameter
A0
B0
K0
P0
P1
P2
W
Pin1
Package Type
W1
(mm)
(mm) (mm) (mm) (mm) (mm) (mm) (mm) Quadrant
WLCSP-2.0×2.0-25B
7″
9.5
2.24
2.24
0.75
4.0
4.0
2.0
8.0
Q1
SG Micro Corp
TX10000.000
www.sg-micro.com
PACKAGE INFORMATION
CARTON BOX DIMENSIONS
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF CARTON BOX
Length
(mm)
Width
(mm)
Height
(mm)
Reel Type
Pizza/Carton
7″ (Option)
7″
368
442
227
410
224
224
8
18
SG Micro Corp
www.sg-micro.com
TX20000.000
相关型号：
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