A8180
AiT Semiconductor Inc.
www.ait-ic.com
LED LIGHTING DRIVER
HIGH BRIGHTNESS LED DRIVER WITH INTERNAL SWITCH
ELECTRICAL CHARACTERISTICS
Test conditions: VIN =12V, TA = 25°C, unless otherwise noted
Parameter
Symbol
VIN
VUVLO
VUVLO(HYS)
IQ(OFF)
Conditions
Min
6
Typ.
Max
32
Units
V
V
V
μA
Input voltage
Under voltage lock out
UVLO hysteresis
Quiescent supply current with output off
Quiescent supply current with output
switching
VIN rising
VIN falling
ADJ Pin grounded
ADJ Pin floating
f=250kHz
5.07
4.87
120
IQ(ON)
1.8
50
mA
mV
Measure on ISENSE pin
Mean current sense threshold voltage
VISENSE
96
100
104
with respect to VIN
Sense threshold hysteresis
ISENSE pin input current
ADJ pin floating voltage
VSENSE(HYS)
ISENSE
VADJ
±15
1.2
4
%
μA
V
VISENSE=VIN-0.1
ADJ pin floating
ADJ pin grounded
10
ADJ pin leakage current
IADJ
5
μA
ADJ pin pull up resistor to internal
supply voltage
RADJ
1
MΩ
DC voltage on ADJ pin to switch device
from active (on) state to quiescent (off) state
DC voltage on ADJ pin to switch device
from quiescent (off) state to active (on) state
Digital dimming ADJ pin input voltage high
Digital dimming ADJ pin input voltage low
DC brightness control
Recommended Digital dimming frequency
Duty cycle range of PWM signal applied to
ADJ pin during low frequency PWM
dimming mode
VADJ(OFF)
VADJ(ON)
VADJ falling
VADJ rising
0.15
0.2
0.25
0.3
V
0.2
1.5
0.25
V
VADJ(H)
VADJ(L)
VADJ(DC)
fADJ
V
V
V
0.2
1.2
20
0.3
0.1
kHz
fADJ=100Hz
fADJ =10kHz
0.1
100
％
％
DPWM(LF)
Brightness control range
1000:1
Duty cycle range of PWM signal applied to
ADJ pin during high frequency PWM
dimming mode
5
100
DPWM(HF)
Brightness control range
LX switch on resistance
LX switch leakage
20:1
0.35
0.1
RLX
ILX(LEAK)
0.7
5
1.4
Ω
μΑ
A
Continuous LX switch current
ILX(MEAN)
Delay time between
ADJ pin rising edge
and LX pin falling edge
Delay time between
ADJ pin falling edge
and LX pin rising edge
Chip enable delay time
Chip disable delay time
tEN,DELAY
480
25
ns
ns
tENB,DELAY
Recommended maximum operating frequency
Over temperature protection threshold
Over temperature protection hysteresis
fLX(MAX)
TOTP
TSD(HYS)
1
MHz
℃
Temperature rising
Temperature falling
160
20
℃
REV3.0
- APR 2010 RELEASED, JAN 2017 UPDATED -
- 4 -
AITSEMI [ AiT Semiconductor ]
