MAX16834_15 Datasheet, PDF (8/23 Pages) Maxim Integrated Products – High-Power LED Driver with Integrated High-Side LED Current Sense and PWM Dimming MOSFET Driver

MAX16834
High-Power LED Driver with Integrated
High-Side LED Current Sense and
PWM Dimming MOSFET Driver
IN
SGND
UVEN
RT/SYNC
SC
CS
REFI
SENSE+
COMP
HV
LV
PWMDIM
OVP+
REFERENCE
VBG
OSC
5kΩ
BLANK
7V
LDO
UVLO
TO
INTERNAL
CIRCUITRY
TEMPERATURE
SENSE
RAMP
GENERATOR
CURRENT-LIMIT
COMPARATOR
0.6V
PWM
COMP
OR
OT
S
Q
R
AND
NDRVB
REF
V_CC
NDRV
PGND
NDRVB
V_REF
LPF
A_V = 9.9
V_LV
0.3V
ERROR
AMPLIFIER
g_m
LED CURRENT-
SENSE AMPLIFIERS
FLTB FLTA
PWMDIM
AND
AND
OT
HIGH-SIDE
5V
LV REFERENCE
V_BG
REGULATOR SWITCH
REFHI
V_BG
V_BG
V_LV ^VBG
FLTB ^AND
V_HV
FLTA
V_LV
V_IN
4.3V
V_LV
V_REF
0.3V
SENSE+
V_LV
128 TOSC
ERROR
REJECT
DELAY
5μs ERROR
REJECT
DELAY
REFHI
4096 TOSC
HICCUP
TIMER
MAX16834
FLT
CLV
DIMOUT
FLTB
Figure 1. Internal Block Diagram
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