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ACT8712 Arkusz danych(PDF) 26 Page - Active-Semi, Inc

Numer części ACT8712
Szczegółowy opis  Four Channel Integrated Power Management IC for Handheld Portable Equipment
PDF  36 Pages
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Producent  ACTIVE-SEMI [Active-Semi, Inc]
Strona internetowa  http://www.active-semi.com
Logo ACTIVE-SEMI - Active-Semi, Inc

ACT8712 Arkusz danych(HTML) 26 Page - Active-Semi, Inc

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WLED BIAS DC/DC CONVERTER
Rev0, 25-Feb-08
ACT8712
Innovative Products. Active Solutions.
- 26 -
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
(ACT8712QLEHA, VVSYS = 3.6V, L = 22µH, CVP1 = CVP2 = 2.2µF, COUT = 2.2µF, TA = 25°C, unless otherwise specified.)
REG3 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
REG3 Efficiency vs. Output Current
Output Current (mA)
100
31
50
90
80
70
60
1
5
9
13
17
21
25
ON2 Duty Cycle (%)
100
100
0
0
PWM Output Current Adjustment
90
80
70
60
50
40
30
20
10
10
20
30
40
50
60
70
80
90
ON2 PWM Frequency = 1kHz
4 LEDs
6 LEDs
CH1
CH2
REG3 Over-Voltage Protection
CH1: VOUT3, 10V/div
CH2: VFB3, 200mV/div
TIME: 2ms/div
0V
REG3 Startup Waveform
CH1
CH2
CH1: VOUT3, 10V/div
CH2: VON2, 1V/div
TIME: 100µs/div
0V
0V
200



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