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HA17384HPS

High Speed Current Mode PWM Control IC for Switching Power Supply

Renesas Electronics 

HA17384SPS/SRP, HA17384HPS/HRP, HA17385HPS/HRP

Functions

• Under-voltage lockout system

• Reference voltage regulator of 5.0 V ± 2%

• Triangular wave (sawtooth) oscillator

• Error amplifier

• Totem pole output driver circuit (direct driving for power MOS FETs)

• Current-detection comparator circuit for current mode

• OVP function (over voltage protection) *1

• TSD function (thermal shut-down protection) *1

• Protect function by zener diode (between power input and GND)

Note: 1. H series only.

Features

• High-safety UVL circuit is used (Both VIN and Vref are monitored)

• High speed operation:

⎯ Current detection response time: 100 ns Typ

⎯ Maximum oscillation frequency: 500 kHz

• Low standby current: 170 µA Typ

• Wide range dead band time

(Discharge current of timing capacitance is constant 8.4 mA Typ)

• Able to drive power MOSFET directly

(Absolute maximum rating of output current is ±1 A peak)

• OVP function (over voltage protection) is included *1

(Output stops when FB terminal voltage is 7.0 V Typ or higher)

• TSD function (thermal shut-down protection) is included *1

(Output stops when the temperature is 160°C Typ or higher)

• Zener protection is included

(Clamp voltage between VIN and GND is 34 V Typ)

• Wide operating temperature range:

⎯ Operating temperature: –20°C to +105°C

⎯ Junction temperature: 150°C *2

Notes: 1. H series only.

2. S series only.

Rev.3.00 Jun 15, 2005 page 2 of 28

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