HV9925 Supertex, Inc., HV9925 Datasheet - Page 9

• Manufacturer Part Number: HV9925
• Description: Programmable-current Led Lamp Driver Ic With Pwm Dimming
• Manufacturer: Supertex, Inc.

Pin Description
Figure 4. Switching Waveforms. CH1: V
Pin # Function Description
Figure 6. PWM Dimming – Rising Edge. CH4: 10×I
1
2
3
4
5
6
7
8
RSENSE Source terminal of the output switching MOSFET provided for current sense resistor connection.
PWMD
DRAIN
GND
VDD
NC
Common connection for all circuits.
PWM Dimming input to the IC.
Power supply pin for internal control circuits. Bypass this pin with a 0.1uF low impedance capacitor.
No connection.
Drain terminal of the output switching MOSFET and a linear regulator input.
RSENSE
, CH2: V
OUT
DRAIN
9
Figure 7. PWM Dimming – Falling Edge. CH4: 10×IOUT
Figure 5. Switch-On Transition – Leading Edge Spike.
CH1: VR
SENSE
, CH2: V
DRAIN
HV9925