GR6004KG [GRENERGY]
Constant Current Switching Converter for High Brightness LED Driving;
| 型号： | GR6004KG |
| 厂家： | 
Grenergy Opto, lnc. |
| 描述： | Constant Current Switching Converter for High Brightness LED Driving |
| 文件： | 总13页 (文件大小：756K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
GR6004
Constant Current Switching Converter for High Brightness
LED Driving
Features
General Description
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Wide input voltage range from 4.5V to 26V
The GR6004 is a high efficiency constant current
driver for high brightness LED. The 0.2V reference
voltage minimized the power dissipation of the LED
current set resistor that located between FB to GND.
This low reference voltage increases the efficiency
apparently with the one LED load condition. Beside,
Maximum efficiency over 95%
1.5A output current for HB LED
0.2V reference voltage for high efficiency
100mΩ integrated power PMOSFET
Built-in soft start
750KHz fixed switching frequency
Over-current protection
a
100mΩ integrated power PMOSFET only
dissipated a little power in the conduction period. In
order to meet the mini size applications, the small
size inductor and output capacitor usually used
under the 750KHz operating. There are over-
temperature protection (OTP) and over-current
protection (OCP) in GR6004. These protection
functions could prevent GR6004 from damage in
abnormal situations.
Over-temperature protection
SOP-8/SOP-8-EP package
Lead free and green devices available
Application
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MR16 LED lamp
Luminance applications with DC input voltage
LED flashlight
Ordering and Marking Information
SOP-8/SOP-8-EP
Grenergy OPTO Inc. reserves the right to make changes to improve reliability or manufacture ability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
2010.04 Ver. 1.01 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
1
GR6004
Pin Configuration
Pin Description
Pin No.
Name
Function
1
2
3
4
5
6
VIN
EN
Power supply input
Enable input
UGND
VCC
LX
Gate driver power ground of the internal power PMOSFET
The output of the 4.2V linear regulator
Power switching output, this point is the drain terminal of the internal main switch
COMP
The output of the error amplifier that used to connected the compensator
Feedback input. The reference voltage is 0.2V in the non-inverting terminal of the error
7
FB
amplifier
8
9
GND
LX
Ground
Exposed pad (Only in SOP-8-EP).
Absolute Maximum Ratings
Supply voltage, VIN ------------------------------------------------------------------------------------------------- -0.3V ~ 30V
Regulator output voltage, VCC ---------------------------------------------------------------------------------- -0.3V ~ 6.5V
UGND to GND voltage, VUG_GND ------------------------------------------------------------------------ -0.3V ~ VIN + 0.3V
VIN to UGND voltage, VVIN_UG ---------------------------------------------------------------------------------- -0.3V ~ 6.5V
EN to GND voltage, VEN ----------------------------------------------------------------------------------------------------- 20V
FB to GND voltage, VFB ---------------------------------------------------------------------------------- -0.3V ~ VCC + 0.3V
COMP to GND voltage, VCOMP -------------------------------------------------------------------------- -0.3V ~ VCC + 0.3V
LX to GND voltage, >100ns, VLX1 ------------------------------------------------------------------------- -2V ~ VIN + 0.3V
LX to GND voltage, <100ns, VLX2 ---------------------------------------------------------------------------- -5V ~ VIN + 6V
Junction temperature, TJ ------------------------------------------------------------------------------------------------ 150°C
Operating ambient temperature, TA ----------------------------------------------------------------------- -20°C to 85°C
Storage temperature range, TSG -------------------------------------------------------------------------- -65°C to 150°C
NOET1
Junction to ambient thermal resistance (SOP-8), θJA
-------------------------------------------------
85°C/W
Power dissipation (SOP-8, at ambient temperature = 85°C)
------------------------------------------------ 760mW
Lead temperature (Soldering, 10sec)
-------------------------------------------------------------------------------- 260°C
ESD voltage protection, human body model --------------------------------------------------------------------- 3.0KV
ESD voltage protection, machine model --------------------------------------------------------------------------
NOTE1 The tested PCB area is 4 inch square with 2 layer FR4.
300V
2
2010.04 Ver. 1.01 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
GR6004
Recommended Operating Conditions
Item
Min.
Max.
26
Unit
V
Supply voltage VIN
Output current IOUT
4.5
0.005
1.5
A
Block Diagram
2010.04 Ver. 1.01 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
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GR6004
Electrical Characteristics (VIN = 12V, TA = 25°C, unless otherwise specified.)
Parameter
VIN SECTION
Symbol
Test Conditions
Min
Typ
Max Units
VIN supply current
IVIN
VFB = 0.25V, VEN = 3V, LX open
-
-
1.0
-
2.0
5
mA
VIN shutdown supply current
VCC SECTION
IVIN_SD VEN = 0V, VIN = 26V
µA
VCC supply current
VCC shutdown supply current
VCC POR threshold
VCC POR hysteresis
Output voltage
IVCC
VFB = 0.3V, VEN = 3V, VCC = 5V
-
-
0.7
-
-
1
mA
uA
V
IVCC_SD VEN = 0V, VCC = 5V
VPOR VCC rising
VPOR_HY VCC falling
3.4
3.7
4.0
-
0.15
4.1
-
V
VIN = 5.5V~26V. IVCC = 0mA~-8mA
3.9
4.5
V
IVCC = 0mA ~ -8mA
VIN = 6.2V ~ 26V
-60
10
-40
-
0
Load regulation
mV
mA
30
Current limit
ICC_LIM
SOFT START SECTION
Soft start time
-
0.7
1
TSS
ms
OSCILLATOR SECTION
Switching frequency
Foldback frequency
Maximum duty
fOSC
VIN = 4.5V ~ 26V
670
750
110
93
830
KHz
KHz
%
fOSC_FB VFB = 0V
DMAX
-
-
-
-
INTERNAL PMOSFET SECTION
Turn on resistance
RDS_ON
-
100
140
mΩ
ERROR AMPLIFIER SECTION
Reference voltage
VREF
-
0.2
-
V
FB pin input current
Reference voltage accuracy
Transconductance
IFB
VFB = 0.2V
-100
-5
-
-
100
5
nA
%
VIN = 4.5V~26V; TJ = -40 ~125
Gm
-
400
-
uS
EN PIN SECTION
EN enable voltage threshold
EN enable voltage threshold
EN clamped voltage
EN pin input current
VEN_R VEN rising, VIN = 4.5V ~ 26V
VEN_F VEN falling, VIN = 4.5V ~ 26V
VEN_CLM IEN = 10mA
-
-
-
-
-
2.1
-
V
V
0.5
12
17
500
V
IEN
VEN < 3V
-500
nA
OVER-TEMPERATURE PROTECTION SECTION
Over-temperature threshold
Over-temperature hysteresis
TOTP
-
-
150
50
-
-
TOTP_HY
OVER-CURRENT PROTECTION SECTION
Peak current limit threshold ILIM
3
4
5
A
2010.04 Ver. 1.01 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
4
GR6004
Typical Performance Characteristics
Feedback Voltage vs. Temperature
VEN vs. IEN
220
215
210
205
200
195
190
185
180
14
12
10
8
6
4
2
0
-50 -25
0 25 50 75 100 125
Temperature( )
0
1000 2000 3000 4000 5000
EN(µA)
I
Quiescent Current vs. Temperature
Switching Frequency vs. Temperature
800
780
760
740
720
700
1.10
1.05
1.00
0.95
0.90
0.85
0.80
-50
0 50
Temperature(
100
)
150
-50
0 50
Temperature(
100
)
150
LED Current vs. PWM Dimming Duty
Switching Frequency vs. VIN
400
350
300
250
200
150
100
50
760
756
752
748
744
740
0
0
20
40
60
PWM Dimming Duty(%)
80
100
0
10
20
30
V
IN(V)
2010.04 Ver. 1.01 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
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GR6004
Typical Performance Characteristics (Cont.)
Efficiency vs. LED Current_1
Efficiency vs. LED Current_2
90
88
86
84
82
80
78
76
74
72
70
95
93
91
89
87
85
83
81
79
77
75
3VF
2LED
V =24V
IN
1LED
V =12V
IN
0
200
400 600
I LED(mA)
800 1000
0
200 400 600 800 1000 1200
LED(mA)
I
Efficiency vs. LED Number_1
Efficiency vs. LED Number_2
95
100
95
90
85
80
75
VIN=12V
VIN=24V
91
87
83
79
75
I
ILED=350mA
I =350mA
LED
I
ILED=500mA
ILED=500mA
1
2
3
4
5
6
7
8
0
1
2
3
4
LED Counts in Serial
LED Counts in Serial
LED Current Regulation_1
LED Current Regulation_2
400
390
380
370
360
350
340
330
320
310
300
550
540
530
520
510
500
490
480
470
460
450
ILED=350mA
ILED=500mA
V =24V
IN
V =24V
IN
V =12V
IN
V =12V
IN
1
2
3
4
5
LED Counts in Serial
6
7
1
2
3
4
5
LED Counts in Serial
6
7
2010.04 Ver. 1.01 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
6
GR6004
Application Information
Start Up Function
(2) could find by observing Figure-1 to calculate the
inductance.
The GR6004 has an internal fixed start up period
that is approximately 0.5ms. This function can
prevent the inrush current in power on process.
(
VLED +0.2+VD5 ) (V −VLED −0.2)
IN
L =
⋅
⋅TS
(2)
1
K ⋅ILED
V
IN
VCC Regulator
The VCC is the output terminal of the internal
regulator. A ceramic capacitor in this pin for voltage
regulation is required. The capacitance range is
from 0.1µF to 1µF.
Where, k is the part of ILED in percentage to define
the magnitude of inductor current ripple, TS is the
period of a switching cycle.
Enable Function
An enable function was applied in GR6004. A logic
high cause the GR6004 active and the logic low
disable the operation. The soft start period starts
when the enable signal restarts the operation of
GR6004. Locate a 100KΩ resistor between EN and
VIN to force the GR6004 operating with the VIN
greater than 9V. If the VIN is between 4.5V to 9V,
connect the EN to VIN directly.
Figure-1 The Sketch map explains the inductor current
ripple, inductor voltage, LED current setting and
PWM dimming.
Input Capacitor Selection
The input capacitor must have a rated voltage
greater than the maximum input voltage. The rated
ripple current in RMS of the input capacitor also
must be greater than the RMS value of input current.
The (1) could use to find the RMS value of input
current.
Output Capacitor Selection
The output capacitor could easy find by (3). Besides,
the rated voltage must be greater than the output
voltage.
TS ⋅K ⋅ILED
IIN_RMS = D⋅
(
1−D
)
⋅ILED
1
( )
CO =
(3)
8⋅ ∆VO
Where, IIN_RMS is the RMS value of input current, ILED
is the average current of LED.
Where, ∆VO is the output voltage ripple that
accepted by the users.
Inductor Selection
Freewheel Diode Selection
The value of the inductor in the power stage could
find by the inductor current ripple. A reasonable
range of the inductor current ripple is range from
20% to 40% of the output LED driving current. The
Two specifications of freewheel diode must be
considered, the maximum reverse voltage must be
greater than the maximum voltage across the
freewheel diode. The average rectified current also
2010.04 Ver. 1.01 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
7
GR6004
needs to be greater than the IPEAK that shown in the
(2) Locate the CIN close to GR6004 as possible.
Figure-1. Where, the IPEAK is the peak current of the
L1.
(3) Locate the D5 and L1 to GR6004 as close as
possible.
(4) Locate the C3 to GR6004 as close as possible.
Compensation
The dominate pole compensation can satisfy the
loop stability of LED driving circuit by use the
GR6004. Locate a capacitor in the COMP could
reach this goal. The compensation capacitance
range is from 1nF to 100nF. This compensation
manner was applied in the normal LED application
with a constant driving current.
GND
R
C
C
C3
GR6004
C
VIN
D
CIN
D5
L
L1
C
PWM Dimming
C
R
VOUT
CO
GND
LED
The PWM dimming function can implement by
adding a pull low switch in the COMP pin. Please
refer the application circuit of Figure-4 to operate in
this function.
RS
Top Layer
Bottom Layer
ON Period Current Loop
OFF Period Current Loop
Over-current Protection
The GR6004 has over-current protection to limit the
maximum current by restricting the peak value of
inductor current.
GND
CIN
C
VIN
R
C
C
C3
Over-temperature Protection
GR6004
D5
C
The GR6004 provides an over-temperature
protection function to prevent the system damage.
In the higher ambient temperature situation, the
large power dissipation on the GR6004 could trip
the OTP to turn the GR6004 off. The GR6004 can
operate from stop state when the junction
temperature of the GR6004 drops approximately
D
L
L1
VOUT
C
R
GND
LED
CO
To the ground of CIN
RS
Top Layer
Bottom Layer
ON Period Current Loop
OFF Period Current Loop
Exposed Pad
50
.
Figure-2 The PCB layout sketch map shown the layout
considerations and the relative locations of the
key components.
PCB Layout Consideration
Figure-2 shows the PCB layout considerations of
GR6004. These guidelines detailed below.
(1) Locate the CIN, D5, L1, CO and RS closely each
other to reduce the current loop of on period
and off period.
2010.04 Ver. 1.01 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
8
GR6004
Typical Application Circuit
Figure-3 .The MR16 application circuit to drive two LED in serial.
Bill of Material of Figure-3
Designator Qty.
Description
Package
SO8
Part Number
GR6004
WR06X3003FTL
Producer
Constant Current
Converter
U1
1
Grenergy
R1
1
1
1
2
1
1
1
300KΩ/ 1%
0.56Ω/ 1%
0603
1206
WALSIN
RS
TZAI YUAN
CIN
Electro-Lytic Capacitor
0.1µF/50V
EKZM250ELL471MJC5S Chemi-Con
C1, C2
C3
0603
0603
0805
C1608X7R1H104K
C1608X7R1H102K
C2012Y5V1C105Z
TDK
1nF/50V
TDK
CO
1.0µF/25V
TDK
L1
33µH/0.88A
5 X 5 (mm) PI0504-330
ECORE
D1, D2, D3,
D4, D5
5
2A/40V Schottky Diode
SMA SS24
LI-SION
2010.04 Ver. 1.01 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
9
GR6004
Typical Application Circuit (Cont.)
Figure-4 The constant current application circuit for LED driving with the external PWM dimming function.
Bill of Material of Figure-4
Designator Qty.
Description
Constant Current
Converter
Package
SO8
Part Number
GR6004
Producer
Grenergy
U1
1
R1
1
1
1
2
1
1
1
1
300KΩ/ 1%
0603
1206
1206
0603
0603
0805
WR06X3003FTL
WALSIN
TZAI YUAN
Kyocera
TDK
RS
0.56Ω/ 1%
CIN
C1, C2
C3
4.7µF /25V
CM21X5R475K25AJ
C1608X7R1H104K
C1608X7R1H102K
C2012Y5V1C105Z
0.1µF/50V
1nF/50V
TDK
CO
L1
1.0µF/25V
TDK
33µH/0.88A
5 X 5 (mm) PI0504-330
ECORE
LI-SION
D1
2A/40V Schottky Diode
20VGSS/60VDSS, 100mA
NMOSFET
SMA
SS24
M1
1
SOT-23
2N7002
LI-SION
2010.04 Ver. 1.01 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
10
GR6004
Package Information
SOP-8
SYMBOL
INCHES
MILLIMETERS
MIN.
MAX.
1.75
0.25
MIN.
MAX.
0.069
0.010
A
A1
A2
b
0.10
1.25
0.31
0.17
4.80
5.80
3.80
0.004
0.049
0.012
0.007
0.189
0.228
0.150
0.51
0.25
5.00
6.20
4.00
0.020
0.010
0.197
0.244
0.157
c
D
E
E1
e
1.27 BSC
0.050 BSC
h
0.25
0.40
0o
0.50
1.27
8o
0.010
0.016
0o
0.020
0.050
8o
L
Note: 1. Followed from JEDEC MS-012 AA.
2. Dimension “D” does not include mold flash, protrusions or gate burrs. Mold flash, protrusion or gate
burrs shall not exceed 6 mil per side.
3. Dimension “E1” does not include inter-lead flash or protrusions. Inter-lead flash and protrusions shall
not exceed 10 mil per side.
2010.04 Ver. 1.01 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
11
GR6004
Package Information
SOP-8-EP
SYMBOL
MILLIMETERS
INCHES
MIN.
MAX.
1.60
0.15
MIN.
MAX.
0.063
0.006
A
A1
A2
b
0.00
1.25
0.31
0.17
4.80
2.25
5.80
3.80
2.00
0.000
0.049
0.012
0.007
0.189
0.098
0.228
0.150
0.079
0.51
0.25
5.00
3.50
6.20
4.00
3.00
0.020
0.010
0.197
0.138
0.244
0.157
0.118
c
D
D1
E
E1
E2
e
1.27 BSC
0.050 BSC
h
0.25
0.40
0
0.50
1.27
8
0.010
0.016
0
0.020
0.050
8
L
o
Note: 1. Follow JEDEC MS-012 BA.
2. Dimension “D” does not include mold flash, protrusions or gate burrs. Mold flash,
protrusion or gate burrs shall not exceed 6 mil per side.
3. Dimension “E1” does not include inter-lead flash or protrusions. Inter-lead flash and
protrusions shall not exceed 10 mil per side.
2010.04 Ver. 1.01 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
12
GR6004
Carrier Tape & Reel Dimensions
SOP- 8
Application
SOP-8
A
H
50 MIN.
P1
T1
C
d
D
W
E1
F
12.4+2.00 13.0+0.50
-0.00 -0.20
330.0 2.0
1.5 MIN. 20.2 MIN. 12.0 0.30 1.75 0.10 5.5 0.05
P0
P2
D0
D1
T
A0
B0
K0
1.5+0.10
-0.00
0.6+0.00
-0.40
4.0 0.10
8.0 0.10 2.0 0.05
1.5 MIN.
6.40 0.20 5.20 0.20 2.10 0.20
(mm)
Devices Per Unit
Application
SOP- 8
Carrier Width
Cover Tape Width
Devices Per Reel
12
-
2500
________________________________________________________________________
Grenergy OPTO, Inc. reserves the right to make corrections, modifications, enhancements, improvements, and other changes
to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the
latest relevant information before placing orders and should verify that such information is current and complete.
2010.04 Ver. 1.01 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
13
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