参数资料
型号: UC3844BNG
厂商: ON Semiconductor
文件页数: 11/19页
文件大小: 0K
描述: IC REG CTRLR PWM CM 8-DIP
标准包装: 50
PWM 型: 电流模式
输出数: 1
频率 - 最大: 275kHz
占空比: 50%
电源电压: 10 V ~ 30 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: 0°C ~ 70°C
封装/外壳: 8-DIP(0.300",7.62mm)
包装: 管件
产品目录页面: 1127 (CN2011-ZH PDF)
其它名称: UC3844BNGOS
UC3844B, UC3845B, UC2844B, UC2845B
5.0V Ref
+
-
V CC
7(12)
V in
+
-
T
7(11)
6(10)
Q1
The addition of the RC filter will eliminate
instability caused by the leading edge spike
on the current waveform.
S
R
Q
5(8)
Comp/Latch
3(5)
C
R
R S
Figure 24. Current Waveform Spike Suppression
V CC
7(12)
V in
+
0
I B
V in
5.0V Ref
+
-
Base Charge
Removal
+
-
7(11)
C1
-
R g
Q1
Q1
6(10)
S
R
T
Q
6(10)
5(8)
5(8)
Comp/Latch
3(5)
R S
3(5)
R S
Series gate resistor R g will damp any high frequency
parasitic oscillations caused by the MOSFET input
capacitance and any series wiring inductance in the
gate-source circuit.
Figure 25. MOSFET Parasitic Oscillations
http://onsemi.com
11
The totem pole output can furnish negative base current
for enhanced transistor turn-off, with the addition of
capacitor C 1 .
Figure 26. Bipolar Transistor Drive
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UC3844BVD1 功能描述:电流型 PWM 控制器 52kHz 1A Current PWM RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14