參數(shù)資料
型號: PUCC3801
廠商: NXP Semiconductors N.V.
英文描述: Current-mode PWM controller
中文描述: 電流模式PWM控制器
文件頁數(shù): 1/16頁
文件大?。?/td> 308K
代理商: PUCC3801
PUCC3801
Current-mode PWM controller
Rev. 01 — 10 September 2001
Product data
1.
General description
The PUCC3801 is a current-mode Pulse Width Modulated (PWM) controller
containing all the control and protection functions necessary to implement an off-line,
flyback or forward converter with a minimum number of external components.
2.
Features
I
Very low start-up supply current; 50
μ
A typical
I
Low operating supply current; 1.2 mA typical
I
Accurate, internally-trimmed, fixed frequency oscillator (100 kHz). No external
timing components needed
I
Internal slope compensation. No external ramp components needed
I
Built-in over-voltage and under-voltage detection
I
High-speed over-current trip; 170 ns typical
I
Over-voltage clamp on supply voltage (V
DD
)
I
Internal divider regulates V
DD
to 12 V. No external divider needed
I
Leading edge blanking of the current sense signal
I
Control frequency modulated over a narrow band to reduce Electromagnetic
Interference (EMI)
I
High output drive capability; 150 ns typical rise and fall time into 2 nF load
I
Wide bandwidth (10 MHz) error amplifier with external compensation pin and
simple interface to optocoupler
I
Accurate internal bandgap reference.
3.
Applications
I
Off-line switched mode power supplies
I
Laptop computer mains adaptors
I
Printer power supplies.
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