ACT5880
Rev 2, 03-Sep-13
TYPICAL PERFORMANCE CHARACTERISTICS CONT’D
(TA = 25°C, unless otherwise specified.)
18. The REG4 Start up Waveform, No Load
17. The REG3 External PWM Modulation to Current
CH1
CH1
CH2
CH1: PWM signal
CH1: VOUT4, 0.5V/div
CH2: LED Current (sensed on sample resistor)
TIME: About 1KHz, 20% Duty Cycle
TIME: 40μs/div
20. The REG4 Step Transition Response
19. The REG4 Start up Waveform, Full Load
CH2
CH1
CH3
CH1
CH1: VSDA, 2V/div
CH2: VOUT4, 0.5V/div
CH3: VSCL, 2V/div
TIME: 100μs/div
CH1: VOUT4,0.5V/div
TIME: 40μs/div
22. The Charge Current vs. VVBAT, VCHGIN=5V
21. The REG4 Load Transition Response
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
ACIN/CHGLEV=1/1
ACIN/CHGLEV=0/1
ACIN/CHGLEV=0/0
CH2
CH1
CH1: VOUT4, AC coupled, 50mV/div
CH2: Load Current, 200mA/div
TIME: 400μs/div
0
1
2
3
4
5
VVBAT
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