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.
Pinout
Specifications
| Item |
Symbol |
Rating |
Unit |
Note |
| Supply voltage |
VIN |
30 |
V |
|
| DC output current |
IO |
±0.1 |
A |
|
| Peak output current |
IO PEAK |
±1.0 |
A |
|
| Error amplifier input voltage |
VFB |
0.3 to VIN |
V |
|
| COMP terminal input voltage |
VCOMP |
0.3 to +7.5 |
V |
|
| Error output sink current |
IOEA |
10 |
mA |
|
| Power dissipation |
PT |
680 |
mW |
1, 2 |
| Operating temperature |
Topr |
20 to +105 |
|
|
| Junction temperature |
Tj |
125 |
|
3 |
| 150 |
|
4 |
| Storage temperature |
Tstg |
55 to +125 |
|
3 |
| 55 to +125 |
|
4 |
Notes: 1. For the HA17384HPS and HA17385HPS,
This value applies up to Ta = 43°C; at temperatures above this, 8.3 mW/°C derating should be applied.
For the HA17384SPS,
This value applies up to Ta = 68°C; at temperatures above this, 8.3 mW/°C derating should be applied.DescriptionThe 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 HA17384S/H and HA17385H 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, high-speed, current-detection comparator circuit with variable detection level is incorporated which is required for current mode control.
The HA17384S/H and HA17385H includes the above basic function circuits. In addition to these basic functions, the H Series ncorporates thermal shut-down protection (TSD) and overvoltage protection (OVP) functions, for configuration of witching power supplies that meet the demand for high safety levels.
Between the HA17384S/H and HA17385H , 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, HA17384S/H and HA17385H 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.
HA17385HPS_HRP_1219970 Data Sheet
