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HA17384HRP Dataheets PDF



Part Number HA17384HRP
Manufacturers Hitachi Semiconductor
Logo Hitachi Semiconductor
Description High Speed Current Mode PWM Controller
Datasheet HA17384HRP DatasheetHA17384HRP Datasheet (PDF)

HA17384SPS/SRP, HA17384HPS/HRP, HA17385HPS/HRP High Speed Current Mode PWM Control IC for Switching Power Supply ADE-204-028A (Z) 2nd Edition Nov. 1999 Description The HA17384S/H and HA17385H are PWM control switching regulator IC series suitable for highspeed, current-mode switching power supplies. With ICs from this series and a few external parts, a small, low cost flyback-transformer switching power supply can be constructed, which facilitates good line regulation by current mode control. S.

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HA17384SPS/SRP, HA17384HPS/HRP, HA17385HPS/HRP High Speed Current Mode PWM Control IC for Switching Power Supply ADE-204-028A (Z) 2nd Edition Nov. 1999 Description The HA17384S/H and HA17385H are PWM control switching regulator IC series suitable for highspeed, current-mode switching power supplies. With ICs from this series and a few external parts, a small, low cost flyback-transformer switching power supply can be constructed, which facilitates good line regulation by current mode control. Synchronous operation driven after an external signal can also be easily obtained which offers various applications such as a power supply for monitors small multi-output power supply. The IC series are composed of circuits required for a switching regulator IC. That is a under-voltage lockout (UVL), a high precision reference voltage regulator (5.0 V ± 2%), a triangular wave oscillator for timing generation, a high-gain error amplifier, and as totem pole output driver circuit which directly drives the gate of power MOSFETs found in main switching devices. In addition, a pulse-by-pulse type, highspeed, current-detection comparator circuit with variable detection level is incorporated which is required for current mode control. The HA17384SPS includes the above basic function circuits. In addition to these basic functions, the H Series incorporates thermal shut-down protection (TSD) and overvoltage protection (OVP) functions, for configuration of switching power supplies that meet the demand for high safety levels. Between the HA17384 and HA17385, only the UVL threshold voltages differ as shown in the product lineup table.(See next page.) This IC is pin compatible with the “3842 family” ICs made by other companies in the electronics industry. However, due to the characteristics of linear ICs, it is not possible to achieve ICs that offer full compatibility in every detail. Therefore, when using one of these ICs to replace another manufacturer’s IC, it must be recognized that it has different electrical characteristics, and it is necessary to confirm that there is no problem with the power supply (mounting) set used. 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 MOSFETs) • 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 Note: 1. H series only. 2. S series only. 2 HA17384SPS/SRP, HA17384HPS/HRP, HA17385HPS/HRP Product Line-up Package Additional Function TSD (Thermal shutdown protection) — r r OVP (Over voltage protection) — r r 8.4 7.6 UVL Power Supply Threshold Voltage DILP8 (DP-8) HA17384SPS HA17384HPS HA17385HPS SOP8 (FP-8DC) HA17384SRP HA17384HRP HA17385HRP VTH UVL (V) Typ 16.0 VTL UVL (V) Typ 10.0 Pin Arrangement COMP FB CS RT/CT 1 2 3 4 8 7 6 5 Vref VIN OUT GND (Top view) Pin Function Pin No. 1 2 3 4 5 6 7 8 Note: Symbol COMP FB CS RT/CT GND OUT VIN Vref Function Error amplifier output pin Inverting input of error amp./OVP input pin Current sensing signal input pin Timing resistance, timing capacitance connect pin Groung pin PWM Pulse output pin Power supply voltage input pin Reference voltage 5V output pin 1 Note 1. Overvoltage protection (OVP) input is usable only for the HA17384H and HA17385H. 3 HA17384SPS/SRP, HA17384HPS/HRP, HA17385HPS/HRP Block Diagram 0.8mA UVL1 COMP 1 H 5V band gap reference regulator UVL2 OVP latch R Q S 7 TSD sense 160°C CS latch OR 34V 2R R 1V VIN 8 Vref − + EA 6.5V 1 Vref 2 (2.5V) L VL VH FB (OVP input) 2 − OVP + *1 7.0V 2VF Vref > 4.7V − CS 3 NOR OUT Totem pole output circuit 6 OUT + CS R S Q PWM LOGIC Vref Oscillator + RT/CT 4 − 1.2V 2.8 V Latch set pulse 5 GND 8.4 mA Note: 1. Blocks with bold line are not included in HA17384SPS/SRP. 4 HA17384SPS/SRP, HA17384HPS/HRP, HA17385HPS/HRP Absolute Maximum Ratings Item Supply voltage DC output curre.


HA17384HPS HA17384HRP HA17384SPS


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