Specifications

Lighting
LED lighting
www.digikey.com/maxim-industrial 137
Benefits
• Ideal for environments with widely
varying ambient light
– Wide PWM dimming ratio: up to 3000:1
ratio at 200Hz dimming frequency
• Very flexible—a single IC can work
for many different applications, thus
reducing inventory
– For buck-boost, boost, SEPIC, flyback,
and high-side buck configurations
– Analog and PWM dimming inputs
– Highly flexible, it is used for Maxim’s
MR16 and offline solutions
• Industrial-grade product provides
a fault-safe solution for rough
environments
– Shorted- and open-LED protection
– -40°C to +125°C operating range
MAX16834
The MAX16834 is a highly flexible HB LED driver that can work in
buck, buck-boost, boost, SEPIC, and flyback configurations. It uses
current-mode control of the LED current. By including a driver for a
dimming pass MOSFET, it allows a 3000:1 PWM dimming range. With
its unmatched flexibility, this driver is used for Maxim’s proprietary
solutions for MR16 and offline (PAR, R, A, GU10) retrofit lamps.
Highly flexible HB LED driver provides ideal light intensity over widely varying
ambient-light conditions
V
IN
LV
NDRV
Q1
ON
OFF
CS
C1
PWMDIM
SGND
D1
R10
R8
MAX16834
FLT
DIMOUT
SENSE+
OVP+
CLV
COMP
PGND
C3
UVEN
HV
SC
RT/SYNC
C2
IN
L1
V
CC
C5
REF
C4
R3
REFI
R5
R6
R2
R1
R9
R4
C7
R7
Q2
C6
LED+
LEDs
LED-
Typical operating circuit for the MAX16834.