Rev. 1.00

6

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Rev. 1.00

7

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HT7L4091

Universal Step-Down PWM Control

For High Brightness LED Lighting Control

Recommended Operating Ranges

Operating Temperature Range.....................................................................................-40°C ~ +85°C

Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur.

Operating Ratings indicate conditions for which the device is intended to be functional, but do

not guarantee specific performance limits. The guaranteed specifications apply only for the test

conditions listed.

Note 2: The power supply pin should not be driven by a DC, low impedance power source greater than the

VCLAMP voltage specified in the Electrical Characteristics section.

Block Diagram

LDO

Blank

OTP

R

S

Q

PWMD

0.25V

CS

PDM

VIN

GDR

GND

25V

VDD

RT

0.5V

QB

R

S

Q

QB

LD

100k

OSC

(jitter)

Power

On Reset

UVLO

ON