参数资料
型号: MC34152P
厂商: ON Semiconductor
文件页数: 8/12页
文件大小: 0K
描述: IC MOSFET DRIVER DUAL HS 8DIP
产品变化通告: LTB Notification 03/Jan/2008
标准包装: 1,000
配置: 低端
输入类型: 非反相
延迟时间: 55ns
电流 - 峰: 1.5A
配置数: 2
输出数: 2
电源电压: 6.1 V ~ 18 V
工作温度: 0°C ~ 70°C
安装类型: 通孔
封装/外壳: 8-DIP(0.300",7.62mm)
供应商设备封装: 8-PDIP
包装: 管件
其它名称: MC34152POS
MC34152, MC33152, NCV33152
LAYOUT CONSIDERATIONS
High frequency printed circuit layout techniques are
imperative to prevent excessive output ringing and
overshoot. Do not attempt to construct the driver circuit
on wire ? wrap or plug ? in prototype boards. When
driving large capacitive loads, the printed circuit board
must contain a low inductance ground plane to minimize
the voltage spikes induced by the high ground ripple
currents. All high current loops should be kept as short as
possible using heavy copper runs to provide a low
impedance high frequency path. For optimum drive
V CC
performance, it is recommended that the initial circuit
design contains dual power supply bypass capacitors
connected with short leads as close to the V CC pin and
ground as the layout will permit. Suggested capacitors are
a low inductance 0.1 m F ceramic in parallel with a 4.7 m F
tantalum. Additional bypass capacitors may be required
depending upon Drive Output loading and circuit layout.
Proper printed circuit board layout is extremely
critical and cannot be over emphasized.
47
0.1
6
+
-
5.7V
V in
V in
TL494
or
2
7
R g
D 1
TL594
1N5819
4
5
Series gate resistor R g may be needed to damp high frequency parasitic oscillations
3
The MC34152 greatly enhances the drive capabilities of common switching
regulators and CMOS/TTL logic devices.
Figure 18. Enhanced System Performance with
Common Switching Regulators
7
4X
1N5819
5
3
Output Schottky diodes are recommended when driving inductive loads at high
frequencies. The diodes reduce the driver's power dissipation by preventing the
output pins from being driven above V CC and below ground.
Figure 20. Direct Transformer Drive
caused by the MOSFET input capacitance and any series wiring inductance in the
gate-source circuit. R g will decrease the MOSFET switching speed. Schottky diode
D 1 can reduce the driver's power dissipation due to excessive ringing, by preventing
the output pin from being driven below ground.
Figure 19. MOSFET Parasitic Oscillations
Isolation
Boundary
1N
5819
3
Figure 21. Isolated MOSFET Drive
http://onsemi.com
8
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