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AOZ1977
Additional Waveforms
Non-latching LED Short Protection,
Pin 6 AUTO Connected to 1nF
LED Voltage
(20V/div)
Inductor
Current
(0.5A/div)
Feedback
Voltage
(0.5V/div)
200μs/div
LED Short and Recovery
Inductor
Current
(0.5A/div)
LED Voltage
(20V/div)
500ms/div
Efficiency vs. V IN @ OUT = 195V
(LED Current = 200mA, Boost Frequency = 100kHz)
98.5
98.0
97.5
Latching LED Short Protection,
Pin 6 AUTO Connected to GND
200μs/div
Non-latching OVP Protection
500μs/div
DBRT Control Linearity
(PVIN = 130V, VOUT = 195V)
220
200
180
160
140
LED Voltage
(20V/div)
Inductor
Current
(0.5A/div)
Feedback
Voltage
(0.5V/div)
LED Voltage
(20V/div)
Inductor
Current
(0.5A/div)
120
97.0
100
96.5
80
60
96.0
40
20
DBRT = 100Hz
DBRT = 2kHz
95.0
90
100
110
120
130
140
150
0
0
20
40
60
80
100
V IN (v)
DBRT Duty Cycle (%)
Rev. 2.1 May 2012
www.aosmd.com
Page 9 of 16
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