MAX16812 Maxim Integrated Products, MAX16812 Datasheet - Page 8

• Manufacturer Part Number: MAX16812
• Description: Integrated High-Voltage LED Driver
• Manufacturer: Maxim Integrated Products

Integrated High-Voltage LED Driver
with Analog and PWM Dimming Control
Figure 1. Functional Diagram
8
_______________________________________________________________________________________
H_REG
L_REG
TGRM
DIM
REF
HV
OV
LV
EN
RT
IN
1.238V
LOW TO DISCHARGE
PREG
LDOL
2µs PULSE
LDOH
3.88V
POR
CMP
CMP
OSC
1X
UVLO/
POR
BG
1.238V
SIGNAL
DIM
SGND
1.2X
1.1X
1X
V
REF
OVP
CONTROL
RAMP
DIM
REF
LOGIC
EN
DRMP
S
R
CMP
MAX16812
LATCH
IHI
V
V
RAMP
Q
REFI
= 1.2V
= 0.3V
DS
G1
CMP
CSA
HICCUP
0.5V
t
PWM
X1
D
I
LIM
= 200ns
AGND
1.2V
0.6V
AMPLIFIER
DIMMING
ERROR
AND
S/H
SGND
V
DD
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2.5V
V
ADIM
BE
X0.2
DD
DGT
CS+
CS-
LX
LX
SRC
SRC
GT
DRV
SLP
COMP
FB
CS_OUT
REFI