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AOZ1977
Electrical Characteristics
T A = 25 °C, V ViN = 24 V, unless otherwise specified.
Symbol
Parameter
Conditions
Min.
Typ.
Max
Units
V VIN
I VIN _ ON
VIN Supply Voltage
VIN Quiescent Current
Not Switching
8
30
2
V
mA
V UVLO_RISE
V UVLO_FALL
V VIN _ HYS
VIN UVLO Threshold
VIN UVLO Hysteresis
VIN Rising
VIN Falling
6.2
7
6.5
500
7.3
V
mV
V VDD
VDD Regulation Voltage
8.5 V < V VIN < 30 V
7.5
8
8.5
V
OSCILLATOR
F SW
T ON
Switching Frequency
Minimum ON Time (PWM)
R OSC = 1 M ?
R OSC = 285 k ?
R OSC = 1 M ?
85
298
100
350
150
115
402
200
kHz
kHz
ns
GATE DRIVER
I GATE_SOURCE
I GATE_SINK
Source Current
Sink Current
GATE = 0 V, VDD = 8 V
GATE = 8 V, VDD = 8 V
200
400
250
450
mA
mA
T GATE_RISE
T GATE_FALL
Rise Time
Fall Time
C GATE = 1 nF, VDD = 8 V,
10 % to 90 % of VDD
C GATE = 1 nF, VDD = 8V,
90 % to 10 % of VDD
50
25
85
45
ns
ns
INPUTS
I CS
I ISET
I ILIM
I DBRT
I OVP
I FB
CS Input Current
ISET Input Current
ILIM Input Current
DBRT Input Current
OVP Input Current
FB Input Current
CS = 0.3 V
ISET = 0.5 V
ILIM = 0.4 V (140 % of CS)
DBRT = 5 V
OVP = 1.2 V
FB = 0.5 V
5
5
5
5
5
5
? A
? A
? A
? A
? A
? A
F DBRT
DBRT Dimming Frequency
PWM duty cycle 0.1 % to 99.9 %
100
2000
Hz
OUTPUTS
I VREF
VREF Output Source Current
R VREF = 6 k ? to GND
200
? A
V VREF
VREF Reference Voltage
R VREF = 6 k ? to GND
1.188
1.2
1.212
V
PROTECTION
V ILIM
V OVP
Current Limit Set
OVP Threshold Voltage
CS = 0.3 V
120
0.9
133
1
146
1.1
% of V CS
V
V OVP_HYS
I AUTO
T THERMAL_SD
T THERMAL_HYS
OVP Hysteresis
Auto-Restart Charge Current
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
200
1.25
145
35
mV
? A
°C
°C
DPWM DRIVE
I DPWM_SOURCE
I DPWM_SINK
DPWM Source current
DPWM Sink current
GATE = 0 V
GATE = 8 V
36
46
mA
mA
LOGIC INPUT
V DBRT_HI
V DBRT_LO
Rev. 2.1 May 2012
DBRT Logic High
DBRT Logic Low
www.aosmd.com
2.0
0.8
V
V
Page 6 of 16
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