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ACT8740 Datasheet(PDF) 23 Page - Active-Semi, Inc

Part # ACT8740
Description  Six Channel Integrated Power Management IC for Handheld Portable Equipment
PDF  40 Pages
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Manufacturer  ACTIVE-SEMI [Active-Semi, Inc]
Direct Link  http://www.active-semi.com
Logo ACTIVE-SEMI - Active-Semi, Inc

ACT8740 Datasheet(HTML) 23 Page - Active-Semi, Inc

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WLED BIAS DC/DC CONVERTER
ACT8740
Rev PrB, 25-Feb-08
Innovative Products. Active Solutions.
- 23 -
www.active-semi.com
Copyright © 2008 Active-Semi, Inc.
ActivePMU
TM is a trademark of Active-Semi.
I
2CTM is a trademark of Philips Electronics.
TYPICAL PERFORMANCE CHARACTERISTICS
(ACT8740QLEHA, VVSYS = 3.6V, L = 22µH, COUT = 2.2µF, TA = 25°C, unless otherwise specified.)
REG2 RDSON
900
VSYS Voltage (V)
5.5
800
700
600
500
400
300
2.5
3.0
3.5
4.0
4.5
5.0
REG2 Efficiency vs. Output Current
Output Current (mA)
100
31
50
90
80
70
60
1
5
9
13
17
21
25
4 LEDs
6 LEDs
CH1
REG2/ON[ ] = 0
REG2 Over-Voltage Protection
CH1: VOUT3, 10V/div
CH2: VFB3, 200mV/div
TIME: 2ms/div
REG2 Startup Waveform
CH1
CH2
CH1: VOUT2, 10V/div
TIME: 100µs/div
0V
0V
200
REG2/ON[ ] = 1



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