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参数资料
| 型号： | FAN7346MX |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 5/19页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR 4 CHAN BLU 28SOIC |
| 标准包装： | 1 |
| 拓扑： | PWM |
| 输出数： | 4 |
| 内部驱动器： | 无 |
| 类型 - 主要： | 背光，通用 |
| 电源电压： | 10.5 V ~ 35 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 28-SOIC |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 125°C |
| 其它名称： | FAN7346MXDKR |
Electrical Characteristics
For typical values; T A = 25°C, V IN = 12V, and -25°C ? T A ? 85°C, unless otherwise specified. Specifications to -40°C ~
125°C are guaranteed by design based on final characterization results.
Symbol
Parameter
Condition
Min.
Typ.
Max.
Unit
Under-Voltage Lockout Section (UVLO)
V th
V thhys
I st
I op
Start Threshold Voltage
Start Threshold Voltage Hysteresis
Startup Current
Operating Supply Current
V IN =8V
V IN =12V, Not Switching
8.5
0.5
9.5
1.0
100
1
10.5
1.5
300
3
V
V
μA
mA
ON/OFF Section
V on
V off
On-State Input Voltage
Off-Stage Input Voltage
1.4
5.0
0.7
V
V
R ENA
Pull-Down Resistor
130
200
270
k ?
Reference Section (Recommend 1μF X7R Capacitor)
V REF
V R-LINE
V R-LOAD
V DD
5V Regulation Voltage
5V Line Regulation
5V Load Regulation
8.5V Regulation Voltage
I REF =0mA
10 ? V IN ? 35V
0 ? I REF ? 3mA
V IN =12V
4.9
8.0
5.0
8.5
5.1
50
50
9.0
V
mV
mV
V
LED Current Section
V FBX
V LREF
CH LED Current Reference Voltage
LED Current Reference Voltage
V ADIM =2V
0.5V ? V ADIM ? 4V
194
200
V ADIM
/10
206
mV
V
V ADIM-CLAMPH ADIM Voltage HIGH Clamping Voltage
V ADIM-CLAMPL ADIM Voltage LOW Clamping Voltage
V IN =12V
V IN =12V
3.84
0.45
4.00
0.50
4.16
0.55
V
B CH
Current Balance Between Channels
V ADIM =2V
-1.5
1.5
%
Headroom Voltage Feedback Section
V FBR
Feedback Reference Voltage
0.95
1.00
1.05
V
Open-Loop Gain
I leak
A V
Channel Leakage Current
(3)
PWM ON, V CH =1V
PWM OFF, V CH =30V
V VMIN =1V
0
0
65
100
2
μA
μA
dB
G m
l sin
l sur
Error Amplifier Transconductance
Output Sink Current
Output Source Current
V VMIN =1.5V
V VMIN =0V
V VMIN =2V
140
70
70
180
120
120
220
170
170
μmho
μA
μA
Continued on the following page…
? 2011 Fairchild Semiconductor Corporation
FAN7346 ? 1.0.0
5
www.fairchildsemi.com
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