Datasheet Details
| Part number | BL8501 |
|---|---|
| Manufacturer | SHANGHAI BELLING |
| File Size | 366.76 KB |
| Description | Step down DC/DC controller |
| Datasheet | BL8501_SHANGHAIBELLING.pdf |
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Overview: .. BL8501 Step down DC/DC controller OUTLINE The BL8501 is a CMOS-based PWM step-down DC-DC Converter controller. The device can offer the following advantages: lower supply current and wider operating input-voltage range. The BL8501 consists of an oscillator, a PWM control circuit, a reference voltage unit, an error amplifier, a soft-start circuit, a protection circuit, a PWM/VFM alternative circuit, a chip enable circuit, and detecting input voltage circuit. A low ripple, high efficiency step-down DC-DC converter can be easily posed of this IC with only several external ponents, or a power-transistor, an inductor, a diode and capacitors. Output Voltage can be adjusted with external resistors.
| Part number | BL8501 |
|---|---|
| Manufacturer | SHANGHAI BELLING |
| File Size | 366.76 KB |
| Description | Step down DC/DC controller |
| Datasheet | BL8501_SHANGHAIBELLING.pdf |
|
|
|
Pin No.
1 2 3 4 5 Symbol CE GND VFB EXT VIN Description Chip Enable Pin (Active with “H”) Ground Pin Pin for Feedback Voltage External Transistor Drive Pin (CMOS Output) Power Supply Pin DETAILED DESCRIPTION http://.belling..cn - 1Total 10 Pages 8/8/2006 BL8501 The following description refer to the functional block diagram: Error Amplifier The error amplifier is a high-gain differential amplifier used to regulate the converter output voltage.
The amplifier generates an error signal, which is fed to the PWM parator.
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