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參數(shù)資料
| 型號(hào)： | NCP1337PG |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | PWM Current−Mode Controller for Free Running Quasi−Resonant Operation |
| 中文描述： | 0.5 A SWITCHING CONTROLLER, 130 kHz SWITCHING FREQ-MAX, PDIP7 |
| 封裝： | LEAD FREE, PLASTIC, DIP-7 |
| 文件頁數(shù)： | 2/14頁 |
| 文件大?。?/td> | 148K |
| 代理商： | NCP1337PG |
NCP1337
http://onsemi.com
2
PIN FUNCTION DESCRIPTION
Pin No.
Symbol
Function
Description
1
BO
Brownout and external
triggering
By connecting this pin to the input voltage through a resistor divider, the
controller ensures operation at a safe mains level.
If an external event brings this pin above 3.0 V, the controller’s output is
disabled.
If an external event brings this pin above 5.0 V, the controller is
permanently latchedoff.
By connecting an optocoupler or an auxiliary winding to this pin, the peak
current setpoint is adjusted accordingly to the output power demand.
When the requested peak current setpoint is below the internal standby
level, the device enters soft ripple mode.
This pin senses the primary current and routes it to the internal comparator
via an L.E.B.
Inserting a resistor in series with the pin allows to control the overpower
compensation level.
2
FB
Sets the peak current
setpoint
3
CS
Current sense input and
overpower compensation
adjustment
4
GND
IC ground
5
DRV
Output driver
To be connected to an external MOSFET.
Connected to a tank capacitor (and possibly an auxiliary winding).
When V
CC
reaches 18.6 V, an internal OVP stops the output pulses.
Connected to the highvoltage rail, this pin injects a constant current into
the V
CC
bulk capacitor and ensures a clean lossless startup sequence.
6
VCC
IC supply
8
HV
Highvoltage pin
1
8
2
3
4
6
5
NCP1337
Rcomp
BO
+C
bulk
+
V
CC
V
CC
+
V
OUT
Figure 1. Typical Application Schematic
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相關(guān)代理商/技術(shù)參數(shù) |
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| NCP1338 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:PWM Current-Mode Controller for Free Running Quasi-Resonant Operation |
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| NCP1338PG | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:PWM Current-Mode Controller for Free Running Quasi-Resonant Operation |
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