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| 型号： | FAN6754AMRMY |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 12/14页 |
| 文件大小： | 0K |
| 描述： | IC PWM CTLR 1.5MA 65KHZ 8-SOIC |
| 标准包装： | 1 |
| 输出隔离： | 隔离 |
| 频率范围： | 61kHz ~ 69kHz |
| 输入电压： | 11 V ~ 24 V |
| 输出电压： | 13V |
| 功率（瓦特）： | 400mW |
| 工作温度： | -40°C ~ 105°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | * |
| 包装： | 标准包装 |
| 其它名称： | FAN6754AMRMYDKR |
The HV pin can perform current limit to shrink the
tolerance of Over-Current Protection (OCP) under full
range of AC voltage, to linearly current limit curve, as
shown in Figure 25. FAN6754A also shrinks the V limit
level by half to lower the I 2 R SENSE loss to increase the
heavy-load efficiency.
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0.4
Thermal Protection
An NTC thermistor, R NTC , in series with resistor R A , can
be connected from the RT pin to ground. A constant
current, I RT , is output from the RT pin. The voltage on
the RT pin can be expressed as V RT =I RT ? (R NTC + R PTC ),
where I RT is 100μA. At high ambient temperature, R NTC
is smaller, such that V RT decreases. When V RT is less
than 1.035V (V RTTH1 ), the PWM turns off after 16ms
(t D-OTP1 ). If V RT is less than 0.7V (V RTTH2 ), the PWM turns
off after 185μs (t D-OTP2 ). If the RT pin is not connected to
NTC resistor for over-temperature protection,
connecting a series one 100K Ω resistor to ground to
prevent from noise interference is recommended. This
pin is limited by an internal clamping circuit.
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100 120 140 160 180 200 220 240 260 280 300 320 340 360 380
DC Voltage on HV Pin (V)
Limited Power Control
The FB voltage increases every time the output of the
power supply is shorted or overloaded. If the FB voltage
remains higher than a built-in threshold for longer than
Figure 25. Linearly Current Limit Curve
V DD Over-Voltage Protection (OVP)
V DD over-voltage protection prevents damage due to
abnormal conditions. If the V DD voltage is over the over-
voltage protection voltage (V DD-OVP ) and lasts for t D-
VDDOVP , the PWM pulses are disabled until V DD drops
below the UVLO, then starts again. Over-voltage
conditions are usually caused by open feedback loops.
Sense-Pin Short-Circuit Protection
The FAN6754A provides safety protection for Limited
Power Source (LPS) tests. When the sense resistor is
shorted by soldering during production, the pulse-by-
pulse current limiting loses efficiency for the purpose of
providing over-power protection for the unit. The unit
may be damaged when the loading is larger than the
maximum load. To protect against a short circuit across
the current-sense resistor, the controller is designed to
immediately shut down if a continuously low voltage
(around 0.05V/120μs) on the SENSE pin is detected.
? 2011 Fairchild Semiconductor Corporation
FAN6754A ? Rev. 1.0.3
12
t D-OLP , PWM output is turned off. As PWM output is
turned off, V DD begins decreasing.
When V DD goes below the turn-off threshold (10V) the
controller is totally shut down and V DD is continuously
discharged to V DD-OLP (6.5V) by I DD-OLP to lower the
average input power. This is called two-level UVLO. V DD
is cycled again. This protection feature continues as
long as the overloading condition persists. This prevents
the power supply from overheating due to overloading
conditions.
Noise Immunity
Noise on the current sense or control signal may cause
significant pulse-width jitter, particularly in continuous-
conduction mode. Slope compensation helps alleviate
this problem. Good placement and layout practices
should be followed. Avoiding long PCB traces and
component leads, locating compensation and filter
components near the FAN6754A, and increasing the
power MOS gate resistance improve performance.
www.fairchildsemi.com
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| FAN6754BMLMY | 功能描述:电压模式 PWM 控制器 Hi-Integrated Green Mode PWM Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| FAN6754BMRMY | 功能描述:电压模式 PWM 控制器 Hi-Integrated Green Mode PWM Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| FAN6754KLMY | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FAN6754MLMY | 功能描述:IC CTLR PWM GREEN MODE 8-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - AC-DC 转换器，离线开关 系列:- 标准包装:1 系列:FPS™ 输出隔离:隔离 频率范围:61kHz ~ 73kHz 输入电压:8 V ~ 26 V 输出电压:650V 功率（瓦特）:12W 工作温度:-40°C ~ 115°C 封装/外壳:8-DIP（0.300"，7.62mm） 供应商设备封装:8-MDIP 包装:Digi-Reel® 其它名称:FSL206MRBNFSDKR |
| FAN6754MLMY_F116 | 制造商:Fairchild Semiconductor Corporation 功能描述:IC |
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