参数资料
| 型号： | FSEZ1216BNY |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 11/15页 |
| 文件大小： | 0K |
| 描述： | IC PWM CTLR MOSFET 8-DIP |
| 产品变化通告： | Product Discontinuation 27/Feb/2012 |
| 标准包装： | 59 |
| 输出隔离： | 隔离 |
| 频率范围： | 39kHz ~ 45kHz |
| 输入电压： | 5.5 V ~ 25 V |
| 输出电压： | 600V |
| 功率（瓦特）： | 800mW |
| 工作温度： | -40°C ~ 105°C |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 8-DIP |
| 包装： | 管件 |
| 产品目录页面： | 1222 (CN2011-ZH PDF) |
Functional Description
The proprietary topology of FSEZ1216B enables most
simplified circuit design especially for battery charger
applications. Without secondary feedback circuitry, the
CV and CC control can still be achieved accurately. As
shown in Figure 24, with the frequency-hopping, PWM
operation, EMI problem can be solved by using
minimized filter components. FSEZ1216B also provides
many protection functions. The VDD pin is equipped
with over-voltage protection (OVP) and under-voltage
lockout (UVLO). Pulse-by-pulse current limiting and CC
control ensure over-current protection (OCP) at heavy
loads. The GATE output is clamped at 15V to protect
the external MOSFET from over-voltage damage. Also,
the internal over-temperature-protection (OTP) function
shuts down the controller with latch when over heated.
Figure 24. Frequency Hopping
Startup Current
The startup current is only 10 μ A. Low startup current
allows a startup resistor with a high resistance and a low
wattage to supply the starup power for the controller. A
1.5M ? , 0.25W, startup resistor and a 10 μ F/25V V DD
hold-up capacitor is sufficient for an AC-to-DC power
adapter with a wide input range (100V AC to 240V AC ).
Operating Current
The operating current has been reduced to 3.5mA. The
low operating current results in higher efficiency and
reduces the V DD hold-up capacitance requirement. Once
FSEZ1216B enters deep-green mode, the operating
current is reduced to 1mA, assisting the power supply to
easily meet the power conservation requirement.
Green-Mode Operation
Figure 25 shows the characteristics of the PWM
frequency vs. the output voltage of the error amplifier
(V COMV ). The FSEZ1216B uses the positive,
proportional, output load parameter (V COMV ) as an
indication of the output load for modulating the PWM
frequency. In heavy-load conditions, the PWM
frequency is fixed at 50KHz. Once V COMV is lower than
V N , the PWM frequency starts to linearly decrease from
50KHz to 500Hz, thus providing further power savings
and easily meeting international power-conservation
requirements.
? 2008 Fairchild Semiconductor Corporation
FSEZ1216B Rev. 1.0.0
11
Figure 25. Green-Mode Operation Frequency
vs. V COMV
Constant Voltage (CV) and Constant
Current (CC) Operation
An innovative technique of the FSEZ1216B can
accurately achieve CV/CC characteristic output without
secondary-side voltage or current-feedback circuitry.
There is a feedback signal from the reflected voltage
across the primary auxiliary winding for CV/CC
operation. This voltage signal is proportional to
secondary winding, so it provides the controller the
feedback signal from secondary side and achieves
constant-voltage-output property. In constant-current-
output operation, this voltage signal is detected and
examined by the precise constant-current-regulation
controller, then determines the on-time of the MOSFET
to control input power and provide constant-current-
output property. With feedback voltage V CS across the
current-sense resistor, the controller can obtain the
input power of the power supply. Therefore, the region
of constant-current-output operation can be adjusted by
the current sense resistor.
Temperature Compensation
The FSEZ1216B has built-in temperature
compensation, in order to get better CV regulation at
different ambient temperatures. This internal
compensation current is a positive-temperature-
coefficient (PTC) current that can compensate the
forward-voltage drop of the secondary diode varying
with temperature. This variation causes output-voltage
rising at high temperature.
Leading-Edge Blanking (LEB)
Each time the power MOSFET is switched on, a turn-on
spike occurs at the sense resistor. To avoid premature
termination of the switching pulse, a leading-edge
blanking time is built in. Conventional RC filtering can
therefore be omitted. During this blanking period, the
current-limit comparator is disabled and it cannot switch
off the gate driver.
www.fairchildsemi.com
相关PDF资料 |
PDF描述 |
|---|---|
| FSEZ1216NY | IC PWM PRIMARY REG MOSFET 8-DIP |
| FSEZ1307MY | IC PWM CTLR PRIMARY REG 7-SOIC |
| FSEZ1317AMY | IC PWM CTLR PRIMARY REG 7-SOIC |
| FSEZ1317NY | IC PWM CTLR PRIMARY REG 7-DIP |
| FSEZ1317WAMY | IC CTLR PSR/PWM 7-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| FSEZ1216NY | 功能描述:MOSFET Primary Side Reg. PWM Integrated Power RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube |
| FSEZ1216NY_SN00026 | 功能描述:电源开关 IC - 配电 Primary-side-contr. PWM Integrated RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| FSEZ1217BNY | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FSEZ1307 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Primary-Side-Regulation PWM with Power MOSFET Integrated |
| FSEZ1307MY | 功能描述:IC PWM CTLR PRIMARY REG 7-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:3,000 系列:- 输出隔离:隔离 频率范围:61kHz ~ 71kHz 输入电压:9.4 V ~ 28 V 输出电压:12V 功率（瓦特）:- 工作温度:-40°C ~ 125°C 封装/外壳:SC-74，SOT-457 供应商设备封装:6-TSOP 包装:带卷 (TR) |
发布紧急采购，3分钟左右您将得到回复。