参数资料
型号: FAN6791MY
厂商: Fairchild Semiconductor
文件页数: 10/20页
文件大小: 0K
描述: IC REG CTRLR FLYBK ISO CM 16SOIC
标准包装: 2,500
PWM 型: 电流模式
输出数: 2
频率 - 最大: 130kHz
占空比: 49%
电源电压: 10 V ~ 22 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 16-SOIC(0.154",3.90mm 宽)
包装: 带卷 (TR)
Electrical Characteristics
V DD =18V; R I =24k ? ;T A =25°C, unless noted.
Symbol
DCY MAX-OFYB
Parameter
Maximum Duty Cycle
Conditions
Min.
60
Typ.
65
Max.
70
Units
%
Forward PWM Stage
FBPWM-Feedback Input
A V
Z FB
FB to Current Comparator
Attenuation
Input Impedance
1/3.2
4
1/2.7
5
1/2.2
7
V/V
k ?
V HGH
Output High Voltage
FB Pin Open
5.0
5.2
V
V OPEN-PWM
PWM Open-Loop Protection
Voltage
4.2
4.5
4.8
V
t OPEN-PWM-
HICCUP
t OPEN-PWM
V OZ-OPWM
Interval of PWM Open-Loop
Protection Reset
PWM Open-Loop Protection
Delay Time
V FBPWM for Zero Duty Cycle
R I =24k ?
R I =24k ?
500
80
1.2
600
95
1.3
700
120
1.4
ms
ms
V
IPWM-Current Sense
t PD
Propagation Delay to Output –
V LIMIT Loop
V DD =15V, OPWM
Drops to 9V
60
120
ns
V LIMIT1
V LIMIT2
t BNK
Peak Current Limit Threshold
Voltage 1
Peak Current Limit Threshold
Voltage 2
Leading-Edge Blanking Time
V RMS =1V
V RMS =1.5V
0.75
270
0.80
V LIMIT1 -0.1
350
0.85
450
V
V
ns
Slope Compensation
Δ V SLOPE
Δ V s = Δ V SLOPE x (t on /t)
Δ V s : Compensation Voltage
0.40
0.45
0.55
V
Added to Current Sense
OPWM-GATE Driver
V OPWM-CLAMP
Output Voltage Maximum
(Clamp)
V DD =22V
16
18
V
V OL
V OH
Output Voltage Low
Output Voltage High
V DD =15V; I O =100mA
V DD =13V; I O =100mA
8
1.5
V
V
t R
t F
DCY MAX-OPWM
Rising Time
Falling Time
FAN6791 Maximum Duty Cycle
FAN6793 Maximum Duty Cycle
V DD =15V; C L =5nF;
O/P=2V to 9V
V DD =15V; C L =5nF;
O/P=9V to 2V
R I =24k Ω
30
30
47
60
60
50
48
65
120
110
49
70
ns
ns
%
Soft Start
I SS
Constant Current Output for
Soft-Start
R I =24k Ω
17
20
23
μA
R D
Discharge Resistance
470 564
Ω
Notes:
1. When activated, the output is disabled and the latch is turned off.
2. This is the threshold temperature for enabling the output again and resetting the latch after over-temperature
protection has been activated.
? 2008 Fairchild Semiconductor Corporation
FAN6791 / FAN6793 ? Rev. 1.0.3
10
www.fairchildsemi.com
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