ACT8712QLEHA-T View Datasheet(PDF) - Active-Semi, Inc
Part Name
Description
MFG CO.
ACT8712QLEHA-T
Active-Semi, Inc
'ACT8712QLEHA-T' PDF : 36 Pages View PDF
ACT8712
Rev0, 25-Feb-08
WLED BIAS DC/DC CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS
(ACT8712QLEHA, VVSYS = 3.6V, L = 22µH, CVP1 = CVP2 = 2.2µF, COUT = 2.2µF, TA = 25°C, unless otherwise specified.)
REG3 Efficiency vs. Output Current
100
4 LEDs
90
6 LEDs
80
70
60
50
1
5
9
13 17 21 25
31
Output Current (mA)
PWM Output Current Adjustment
100
ON2 PWM Frequency = 1kHz
90
80
70
60
50
40
30
20
10
0
0 10 20 30 40 50 60 70 80 90 100
ON2 Duty Cycle (%)
900
800
700
600
500
400
300
200
2.5
REG3 RDSON
3.0
3.5
4.0 4.5
VSYS Voltage (V)
5.0
5.5
REG3 Over-Voltage Protection
CH1
CH2
0V
CH1: VOUT3, 10V/div
CH2: VFB3, 200mV/div
TIME: 2ms/div
REG3 Startup Waveform
CH1
0V
CH2
0V
CH1: VOUT3, 10V/div
CH2: VON2, 1V/div
TIME: 100µs/div
Innovative Products. Active Solutions.
ActivePMUTM is a trademark of Active-Semi.
I2CTM is a trademark of Philips Electronics.
- 26 -
www.active-semi.com
Copyright © 2008 Active-Semi, Inc.
Share Link: 