Technical specification and user manual for the Holtek HT45F5Q-5, an 8-bit high-performance RISC microcontroller designed specifically for battery charger…
The HT45F5Q-5 is a Flash Memory A/D type 8-bit high performance RISC architecture microcontroller especially designed for battery charger applications. It features integrated internal oscillators requiring no external components, multi-mode operation (FAST, SLOW, IDLE, and SLEEP), and up to 0.5 μs instruction cycles at an 8MHz system clock.
Key peripheral features include a true EEPROM memory of 512 × 8 bits, In Application Programming (IAP) functionality, and multiple Timer Modules for timing and PWM generation. The device includes a dedicated Battery Charge Module with two 14-bit D/A converters and operational amplifiers to control constant current and constant voltage charging loops, reducing the need for external components like TL431.
| Operating Voltage | 2.2V~5.5V at fSYS=8MHz |
|---|---|
| Instruction Cycle Time | Up to 0.5 μs at 8MHz system clock |
| Flash Program Memory | 8K ×16 |
| Data Memory (RAM) | 512 ×8 |
| EEPROM Memory | 512 ×8 |
| I/O Lines | 27 bidirectional I/O lines |
| External Interrupts | 4 external interrupt lines shared with I/O pins |
| A/D Converter Resolution | 12-bit resolution |
| D/A Converters | Two 14-bit D/A Converters |
| Package Types | 24/28-pin SSOP, 32-pin QFN |
The HT45F5Q-5 is especially designed for battery charger applications.
No, it has fully integrated internal oscillators that require no external components.
The device supports multi-mode operation including FAST, SLOW, IDLE, and SLEEP modes.
Yes, it includes In Application Programming (IAP) function to update application programs.