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SP7601
29V High Voltage LED Driver
FEATURES
Wide Input Voltage Range 4.5V – 29V
1.2MHz Constant Frequency Operation
Low 0.2V Reference Voltage
Adjustable Overcurrent Protection
PWM Dimming and Power sequencing Control
RoHS Compliant, Lead Free Packaging:
Small 6-Pin TSOT Package
DESCRIPTION
The SP7601 is a high current DC to DC Switching Buck LED Driver that features low component
count and high efficiency due to a very low 0.2V reference voltage. High 1.2MHz switching
frequency allows use of very small external components. The SP7601 is compatible with PWM
dimming up to a frequency of 1kHz at 10% Duty Cycle.
TYPICAL APPLICATION CIRCUIT
M1
VIN
L1
Vo / LED +
up to 29V
Cin
2
LED1
1
Vin
Gate
LX
6
Rs
GND
C1
0.1uF
3
SP7601
VDR
FB
4
D1
LEDn
GND
5
D2
Dimming and
Power sequencing
Rf b
Rset
Sept25-07 Rev D
SP7601 29V High Voltage LED Driver
Page 1
? 2007 Exar Corporation
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