HV9957K7-G Supertex, HV9957K7-G Datasheet - Page 17

• Manufacturer Part Number: HV9957K7-G
• Description: LED Lighting Drivers LED DRIVER 6 CHANNEL W/ FAULT PROTECTION
• Manufacturer: Supertex

Specifications of HV9957K7-G

• Product Category: LED Lighting Drivers
• Rohs: yes
• Input Voltage: 5 V
• Maximum Supply Current: 10 mA
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-24
• Minimum Operating Temperature: - 40 C
• Factory Pack Quantity: 3000

Pin Description
Pin #
10
12
13
14
15
16
17
18
19
20
21
22
23
24
11
1
2
3
4
5
6
7
8
9
Underside
Plate
PGND1 Boost converter ground. The internal boost converter switch is connected to these pins.
PGND2 Boost converter ground. The internal boost converter switch is connected to these pins.
COMP
DGND
AGND
DVDD
Name
AVDD
SYNC
FREF
FBST
ISET
SW1
SW2
OVP
SFM
CH1
CH2
CH3
CH4
CH5
CH6
DIM
FLT
Pin
EN
Supertex inc.
Description
Enable input. When held low, shuts down the driver. When briefly toggled low, resets fault protection.
Boost converter internal switch.
Boost converter loop compensation. An RC network connected between this pin and ground establishes
loop stability.
Over voltage protection monitor. Biased at a constant current. A resistor from this pin to V
OVP threshold.
Output current set. A resistor from this pin to ground establishes full-scale output current.
Sets boost converter frequency.
Determines PWM dimming frequency when a SYNC signal is not present. When VDD applied, the
frequency of the DIM signal is used. When a resistor to ground is connected, an internal R-C oscillator
is used. When biased at 0.5 - 0.9×V
Supply for internal analog circuits. Bypass with a 1.0µF capacitor to ground.
Analog ground.
Current sink outputs for driving the LED strings.
Digital ground.
Supply input for internal digital circuits. Bypass locally with a 4.7µF capacitor to ground.
Determines the sync frequency multiplier for SYNC input, DIM input or internal dimming frequency.
Fault output, active low and open drain. An external pull-up is required. May be wire-or’d with other
devices.
Input for an externally applied PWM dimming signal.
Input for synchronizing the PWM drive signal to an external signal. When synchronization is not used,
connect SYNC to ground.
The exposed metal plate on the underside is at ground potential and may be connected to ground or left
floating. It provides heat sinking and should be soldered to a copper area on the PCB.
1235 Bordeaux Drive, Sunnyvale, CA 94089
DD
and a crystal connected, an internal crystal oscillator is used.
17
Tel: [phone]
www.supertex.com
HV9957
BST
sets the