HV857DB1 - Uncategorized Microchip - Free user manual and instructions
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| Product Type | Evaluation Board |
| Brand | Microchip |
| Model | HV857DB1 |
| Application | Drives Electroluminescent (EL) lamps |
| Input Voltage | 2.4 V to 5.5 V DC |
| Output Voltage | Up to 200 V peak-to-peak |
| Switching Frequency | Adjustable, typically 100 Hz to 1 kHz |
| Board Dimensions | Approximately 38 mm x 25 mm (1.5 x 1.0 in) |
| Weight | Approximately 15 g |
| Power Supply Connector | Two-pin header or solder points |
| EL Lamp Connector | Two-pin header or solder points |
| Frequency Adjustment | On-board trimmer potentiometer |
| Brightness Control | PWM or resistor programming on pins |
| Operating Temperature Range | -40 °C to +85 °C |
| Mounting | 2 mounting holes for standoffs |
| Included Components | HV857DB1 board with pre-soldered HV857 IC |
| Key Features | Low power, high voltage, compact size |
| RoHS Compliant | Yes |
Frequently Asked Questions - HV857DB1 Microchip
What is the HV857DB1?
The HV857DB1 is an evaluation board from Microchip for the HV857 high-voltage electroluminescent (EL) lamp driver. It allows quick prototyping and testing of EL backlighting circuits.
How do I connect a power supply?
Connect a DC supply between 2.4V and 5.5V to the VDD and GND terminals. Ensure correct polarity to avoid damaging the board.
What type of EL lamp can I drive?
The board can drive EL lamps with capacitance up to ~20 nF. The operating frequency and voltage are adjustable to match the lamp characteristics.
How do I adjust the output frequency?
Use the on-board trimmer potentiometer to set the switching frequency from about 100 Hz to 1 kHz, which affects brightness and lamp behavior.
Can I control brightness?
Yes, brightness can be controlled by adjusting the frequency, input voltage, or by applying a PWM signal to the enable pin (if available). Consult the datasheet.
What is the maximum output voltage?
The output can reach up to 200 V peak-to-peak, sufficient for most EL lamps.
Is the HV857 IC included?
Yes, the board comes with the HV857 IC pre-soldered, so no additional component placement is needed.
Can I use it with a 3.3V system?
Yes, the input range includes 3.3V, making it compatible with most microcontrollers and logic circuits.
What are the mounting options?
The board has two mounting holes for M2 standoffs, and all signals are broken out to headers.
Where can I find the schematic and datasheet?
The complete documentation, including schematic and PCB layout, is available in the HV857DB1 user manual from Microchip's website.
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USER MANUAL HV857DB1 Microchip
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Product information
Brand : Microchip
Model : HV857DB1
Category : Uncategorized