HA17384SPS Datasheet, PDF (2/29 Pages) Hitachi Semiconductor – High Speed Current Mode PWM Control IC for Switching Power Supply

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 V_IN 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 V_IN 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