HV861K7-G [SUPERTEX]
Dimmable, Low Noise, Dual EL Lamp Driver; 调光，低噪声，双EL灯驱动器
| 型号： | HV861K7-G |
| 厂家： | 
Supertex, Inc |
| 描述： | Dimmable, Low Noise, Dual EL Lamp Driver |
| 文件： | 总7页 (文件大小：680K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HV861
Dimmable, Low Noise, Dual EL Lamp Driver
The device uses a single inductor and a minimum number of
passive components. Using the internal reference voltage,
the regulated output voltage is at a nominal value of 90V.
The EL Lamps will therefore see 90V. The two EL Lamps
can be turned ON and OFF using two CMOS logic inputs,
EN1 and EN2. The driver is disabled when both EN1 and
EN2 are at logic low.
Features
► Adjustable output regulation for dimming
► Lamp fade-in/fade-out capability
► Low audible noise
► 180VPP output voltage for higher brightness
► 1.5V enable input logic high
► Single cell lithium ion compatible
► One miniature inductor to power both lamps
► Separately adjustable lamp and converter frequencies
► Split supply capability
The HV861 has two internal oscillators, a switching MOSFET,
and two high voltage EL Lamp driver H-bridges. Each driver
has its own half bridge common output, COM1 and COM2,
which significantly minimizes the DC offset seen by the EL
Lamp. The frequency for the switching MOSFET is set by an
external resistor connected between the RSW-osc pin and
the supply pin VDD. The EL Lamp driver frequency is set
by an external resistor connected between the REL-osc pin
and the VDD pin. An external inductor is connected between
the LX and VDD pins or VIN for split supply applications.
Depending upon the EL Lamp sizes, a 1.0nF to 10.0nF
capacitor is connected between the CS and ground.
► 16-Lead QFN package
Applications
► Dual display cellular phones
► Keypad and LCD backlighting
► PDAs
► Handheld wireless communication products
► Global Positioning Systems (GPS)
As the switching MOSFET charges the external inductor
and discharges it into the capacitor at CS, the voltage at
CS will start to increase. Once the voltage at CS reaches a
nominal value of 90V, the switching MOSFET is turned OFF
to conserve power.
General Description
The Supertex HV861 is a low noise, dimmable, high
voltage, dual EL Lamp driver designed for driving two
electroluminescent (EL) Lamps with a combined area of 5.0
square inches. The input supply voltage range is from 2.5V
to 4.5V. Enable input logic high can go as low as 1.5V, which
allows logic interface operating from typical 1.8V supplies.
The device is designed to minimize audible noise emitted by
the EL Lamps.
EL Lamp dimming can be accomplished by applying a PWM
logic signal to the PWM pin. The EL Lamp brightness will be
proportional to the PWM duty cycle. The HV861 can also
slowly turn the EL Lamp ON/OFF giving a fade ON/OFF
appearance.
Typical Application Circuit
VIN = 3.2V to 4.2V
100µH Coilcraft
1N4148
4.7µF
LPS4012
3.3MΩ
3.3nF
100V NPO
15
14
7
8
VREG VOUT LX
CS
12
3
1
2
EL1
VDD
V
DD = 3.0V
2.0MΩ
EL1
EL2
REL-osc
RSW-osc
11
9
0.1µF
COM1
EL2
825kΩ
Input Logic Control:
ON = 1.5V to VDD
OFF = 0V to 0.2V
4
5
EN1
EN2
VREF PWM
10
COM2
GND
16
13
6
2.2µF
HV861K7-G
HV861
Ordering Information
Pin Configuration
VREF VREG VOUT PWM
16-Lead QFN
16
15 14 13
Device
3x3mm body,
0.80mm height (max), 0.50mm pitch
REL-osc
RSW-osc
VDD
EL1
1
2
3
4
12
11
HV861
HV861K7-G
COM1
-G indicates package is RoHS compliant (‘Green’)
10 COM2
EL2
EN1
9
5
6
8
7
LX
CS
EN2 GND
16-Lead QFN Package
Absolute Maximum Ratings
Parameter
VDD, supply voltage
Operating temperature
Storage temperature
Power dissipation
Note:
Value
-0.5V to 5.5V
-40°C to +85°C
-65°C to +150°C
1.6W
Pads are at the bottom of the package. Center heat slug is at ground
potential.
Product Marking
Y = Last Digit of Year Molded
H861
YWLL
W = Code for Week Molded
L = Lot Number
VCS, output voltage
-0.5V to +120V
Absolute Maximum Ratings are those values beyond which damage to the
device may occur. Functional operation under these conditions is not implied.
Continuous operation of the device at the absolute rating level may affect
device reliability. All voltages are referenced to device ground.
= “Green” Packaging
16-Lead QFN Package
Thermal Resistance
Package
θja
16-Lead QFN
60 °C/W
Recommended Operating Conditions
Sym
VDD
fSW
Parameter
Min
2.5
40
Typ
Max Units Conditions
Supply voltage
-
-
-
-
-
4.5
200
500
20
V
kHz
Hz
nF
---
---
---
---
---
Switching frequency
EL output frequency
Total EL Lamp capacitance load
Operating temperature
fEL
100
0
CLOAD
TA
-40
+85
°C
Electrical Characteristics (Over recommended operating conditions unless otherwise specified)
Sym
RDS(ON)
VCS
Parameter
Min
Typ
Max Units Conditions
On-resistance of switching transistor
Maximum output regulation voltage
-
80
-
-
7.0
Ω
V
I = 100mA
90
78
62
45
-
100
VDD = 2.5V to 4.5V
-
VDD = 2.5V to 4.5V, VREG = 1.092V
VDD = 2.5V to 4.5V, VREG = 0.862V
VDD = 2.5V to 4.5V, VREG = 0.632V
VDD = 2.5V to 4.5V
VCS
Output regulation voltage
-
-
-
V
V
-
VREG
External input voltage range
0
1.40
2
HV861
Electrical Characteristics (cont.)
Sym
Parameter
Min
Typ
Max Units Conditions
VREFH
VREF output high voltage
1.12
1.26 1.40
V
VDD = 2.5V to 4.5V
VDD = 2.5V to 4.5V
VDD = 2.5V to 4.5V
IREF(SOURCE) Average sourcing current from VREF pin
-
-
6.0
6.0
-
-
µA
µA
IREF(SINK)
Average sinking current from VREF pin
V
= 2.5V,
ENDD1 = EN2 = PWM = low
-
-
-
-
-
-
300
400
500
V
= 3.0V,
ENDD1 = EN2 = PWM = low
IDDQ
Quiescent VDD supply current
nA
V
= 4.5V,
ENDD1 = EN2 = PWM = low
VDD = 2.5V to 4.5V, REL = 2.0MΩ,
RSW = 825kΩ
IDD
Input current going into the VDD pin
-
-
250
µA
IIN
fEL
Input current including inductor current
EL Lamp frequency
-
160
84
10
-
25
50
220
116
100
-
mA
Hz
VIN = 3.2V (see Test Circuit)
REL = 2.0MΩ
190
fSW
PWM
D
Switching transistor frequency
Input PWM frequency
100
kHz RSW = 825kΩ
kHz ---
-
88
-
Switching transistor duty cycle
Enable PWM input logic high voltage
Enable PWM input logic low voltage
Enable PWM input logic high current
Enable PWM input logic low current
Enable PWM input capacitance
%
V
---
VIH
VIL
IIH
1.5
0
VDD
0.2
1.0
-1.0
15
VDD = 2.5V to 4.5V
VDD = 2.5V to 4.5V
VIH = VDD = 2.5V to 4.5V
VIL = 0V, VDD = 2.5V to 4.5V
---
-
V
-
-
µA
µA
pF
IIL
-
-
CIN
-
-
Function Table
EN1
EN2
EL1
Hi Z
Hi Z
ON
EL2
COM1
COM2
Hi Z
ON
IC
0
0
1
1
0
1
0
1
Hi Z
ON
Hi Z
Hi Z
ON
OFF
ON
ON
ON
Hi Z
ON
Hi Z
ON
ON
ON
Typical Performance
Lamp Brightness
VDD
(V)
VIN
(V)
IIN
VCS
FEL
(cd/m2)
Lamp
(mA)
(VPEAK
)
(Hz)
EL1
14.8
-
EL2
-
EL1 ON
EL2 ON
16.9
11.4
25.0
3.0
4.0
93
188
18.0
17.7
EL1 and EL2 ON
14.6
3
HV861
Figure 1: Block Diagram
VDD
LX
CS
EN1
EL1 Enable
EL2 Enable
EL1
EN2
PWM Switch
Oscillator
0 to 88%
RSW-osc
VCS
VCS
VCS
COM1
EL2
Output
Drivers
VSENSE
+
C
-
VREG
VOUT
1.26V
VREF
60pF
GND
COM2
2 x EL Freq.
1 x EL Freq.
REL-osc
PWM VREF
Figure 2: Test Circuit
IIN
VIN
100µH Coilcraft
LPS4012
4.7µF
1N4148
7
3.3MΩ
3.3nF
100V NPO
15
VREG VOUT LX
14
8
CS
IDD
12
3
1
2
EL1
V
DD
VDD
620Ω
2.0MΩ
12nF
12nF
REL-osc
RSW-osc
11
9
0.1µF
COM1
EL2
825kΩ
620Ω
Input Logic Control:
ON = 1.5V to VDD
OFF = 0V to 0.2V
4
5
EN1
EN2
10
COM2
VREF PWM
GND
16
13
6
2.2µF
HV861K7-G
4
HV861
Figure 3: Typical Waveform EL1, COM1 and Differential Waveform EL1 – COM1
Split Supply Configuration
Enable/Disable Configuration
The HV861 can also be used for handheld devices operating EL1 and EL2 outputs can be enabled and disabled via a
from a battery where a regulated voltage is available. This logic control signal on the EN1 and EN2 pins respectively.
is shown in Figure 4. The regulated voltage can be used to When EN1 is high/low, the Lamp1 (EL1) will be ON/OFF.
run the internal logic of the HV861. The amount of current When EN2 is high/low, the Lamp2 (EL2) will be ON/OFF.
necessary to run the internal logic is 250µA max. Therefore, The control signal can be from a microprocessor.
the regulated voltage could easily provide the current with-
out being loaded down.
Figure 4: Split Supply and Enable/Disable Configuration
LX
+
_
D
CIN
Battery Voltage = VIN
RREG
CS
15
VREG VOUT LX
14
7
8
CS
EL1
12
3
1
2
VDD
REL
+
_
EL1
EL2
REL-osc
RSW-osc
11
9
CDD
Regulated Voltage = VDD
COM1
EL2
RSW
4
5
Input Logic Control:
Input Logic Control:
EN1
EN2
VREF PWM
10
COM2
GND
16
13
6
CREF
HV861K7-G
5
HV861
Pin Configuration and External Component Description
Pin #
Name
Description
External resistor from REL-Osc to VDD sets the EL frequency. The EL frequency is inversely pro-
portional to the external REL resistor value. Reducing the resistor value by a factor of two will result
in increasing the EL frequency by two.
1
REL-Osc
fEL = (2.0MΩ • 190Hz) / REL
External resistor from RSW-Osc to VDD sets the switch converter frequency. The switch converter
frequency is inversely proportional to the external R resistor value. Reducing the resistor value
by a factor of two will result in increasing the switch ScWonverter frequency by two.
2
RSW-Osc
fSW = (825kΩ • 100kHz) / RSW
3
4
VDD
EN1
Low voltage input supply pin.
Enable input signal for EL Lamp 1. CMOS logic input pin. Refer to the function table.
5
6
EN2
Enable input signal for EL Lamp 2. CMOS logic input pin. Refer to the function table.
Device ground.
GND
Drain of internal switching MOSFET. Connection for an external inductor.
The inductor LX is used to boost the low input voltage by inductive flyback. When the internal
switch is on, the inductor is being charged. When the internal switch is off, the charge stored in
the inductor will be transferred to the high voltage capacitor CS. The energy stored in the capaci-
tor is connected to the internal H-bridge, and therefore to the EL Lamp. In general, smaller value
inductors, which can handle more current, are more suitable to drive larger size Lamps. As the
inductor value decreases, the switching frequency of the inductor (controlled by RSW) should be
increased to avoid saturation.
7
LX
Connect a 100V capacitor between this pin and ground. This capacitor stores the energy trans-
ferred from the inductor.
8
CS
9
EL2
COM2
COM1
EL1
EL Lamp 2 connection.
10
11
12
Common connection for EL2 Lamp.
Common connection for EL1 Lamp.
EL Lamp 1 connection.
PWM pulse input for EL Lamp dimming. The duty cycle of the PWM signal is proportional to the
output voltage. If PWM dimming is not desired, then the PWM pin should be tied to ground.
13
14
PWM
VOUT
Switched internal reference voltage.
Input voltage to set V regulation voltage. This pin allows an external voltage source to control
the VCS amplitude. ELCLSamp dimming can be accomplished by varying the input voltage to VREG.
The VCS voltage is approximately 71 times the voltage seen on VREG.
15
16
VREG
VREF
External resistor connected between VREG and VOUT pins controls the VCS charging rate. The
charging rate is inversely proportional to the resistor value.
Internal reference voltage to set the regulation voltage. Connect an external capacitor (C ) from
VREF to ground to slowly brighten the lamp during power-up and dim down the lampREFduring
power-down. The size of the capacitor determines the time taken to brighten up or dim down. If
fade-in and fade-out are not required, this pin should be left floating. Fade in/fade out time = CREF
x 210 x 103.
6
HV861
16-Lead QFN Package Outline (K7)
(3x3mm body, 0.80mm height (max), 0.50mm pitch)
Note 1
(Index Area
D/2 x E/2)
D2
D
16
16
1
1
e
Note 1
(Index Area
D/2 x E/2)
E
E2
b
View B
Top View
Bottom View
Note 3
θ
L
A
Seating
Plane
A3
L1
Note 2
A1
Side View
View B
Notes:
1. Details of Pin 1 identifier are optional, but must be located within the indicated area. The Pin 1 identifier may be either a mold, or an embedded metal
or marked feature.
2. Depending on the method of manufacturing, a maximum of 0.15mm pullback (L1) may be present.
3. The inner tip of the lead may be either rounded or square.
Symbol
A
A1
A3
b
D
D2
E
E2
e
L
L1
0.00
-
θ
0O
-
MIN
NOM
MAX
0.70
0.75
0.80
0.00
0.02
0.05
0.18
0.25
0.30
2.85
3.00
3.15
1.50
1.65
1.80
2.85
3.00
3.15
1.50
1.65
1.80
0.20*
0.30*
0.45
Dimension
(mm)
0.20
REF
0.50
BSC
0.15
14O
JEDEC Registration MO-220, Variation WEED-4, Issue K, June 2006.
Dimensions marked with (*) are non-JEDEC dimensions.
Drawings are not to scale.
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline
information go to http://www.supertex.com/packaging.html.)
Doc.# DSFP-HV861
A020708
7
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