Rainbow-electronics MAX16834 Manual de usuario descargar pdf (Pagina 8)

MAX16834

High-Power LED Driver with Integrated High-Side LED

Current Sense and PWM Dimming MOSFET Driver

8 _______________________________________________________________________________________

MAX16834

AND

128 TOSC

ERROR

REJECT

DELAY

5µs ERROR

REJECT

DELAY

4096 TOSC

HICCUP

TIMER

FLTB

SENSE+

4.3V

0.3V

0.6V

REFERENCE

AND

PWMDIM

HIGH-SIDE

REGULATOR

LDO

RAMP

GENERATOR

PWM

COMP

OSC

BLANK

1kΩ

5kΩ

0.3V

= 9.9

UVLO

REF

UVEN

RT/SYNC

REFI

SENSE+

COMP

PWMDIM

OVP+

NDRV

PGND

FLT

CLV

DIMOUT

INTERNAL

CIRCUITRY

CURRENT-LIMIT

COMPARATOR

LED CURRENT-

SENSE AMPLIFIERS

ERROR

AMPLIFIER

LV REFERENCE

SWITCH

NDRVB

TEMPERATURE

SENSE

FLTA

FLTB

REFHI

FLTAFLTB

REF

LPF

REFHI

NDRVB

SGND

Figure 1. Internal Block Diagram

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 21 22

MAX16834 1

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Rainbow-electronics MAX16834 Manual de usuario Pagina 8

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