LM3450_14 datasheet(10/39 Pages) TI1

Part #	LM3450

Description	LED Drivers with Active Power Factor Correction and Phase Dimming Decoder

Download	39 Pages

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Manufacturer	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

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10 / 39 page

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ANGLE

DEMOD

DIM

R

2R

COMP

FB

2.7V

2.5V

346mV

50 PA

1 PA

168mV

3V

75 mV

FLT1

FLT2

500 k:

+

-

Low Power

VCCUV

CS

GND

ZCD

HOLD

GATE

+

-

5 PA

5 k:

40 k:

+

-

LEB

1.5V

LOGIC

&

CONTROL

Over Voltage

Shutdown

Error Amp

Disable

5V

PWM

Current Limit

Multiplier

1.5V

Zero Crossing

6V

BIAS

VCCUV

6V

14V

INTERNAL

REGULATORS

VCC UVLO

+

-

3V

Q

R

S

THERMAL

SHUTDOWN

10V

LEB

VCCUV

Sampled Hold

Transition

140 ns

Low Power

MAXIMUM

OFF-TIME

(340 Ps, 42 Ps)

1 k:

VCCUV

COMP

PRE-BIAS

Amplitude Adjust

Low Power

Reset Off-Timer

Timer Expired

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-

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-

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-

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-

Burst

1.4V

Burst

1.5V

SAMPLE and

LOG REMAP

DIN

DOUT

500 Hz Triangle

DIN

DOUT

VCC

ISEN

VREF

VAC

VADJ

LM3450A has

Continuous Hold

*LM3450 and LM3450A are identical except where indicated in blue

LM3450

SNVS681C – NOVEMBER 2010 – REVISED JUNE 2011

www.ti.com

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