FM FM5324GA

The FM5324GA is an integrated power management IC designed for power banks, incorporating lithium battery charge management, battery boost output, battery level detection, and LED battery level indication.

The FM5324GA employs a switching-mode charging scheme that covers the full charging cycle — trickle charge, constant current (CC), and constant voltage (CV) — with float voltage accuracy of ±1% over the full temperature range, along with the advantages of low charging current ripple and high charging efficiency.

The FM5324GA DC-DC boost converter achieves ±1% output accuracy and delivers boost conversion efficiency exceeding 94%, extending battery runtime.

The FM5324GA features 3 LED driver ports capable of driving 4 LEDs to display battery level. An integrated logic locking function prevents unstable battery level indication states.

The FM5324GA incorporates multiple protection features, including load overcurrent protection, soft-start protection, input overvoltage protection, output short-circuit protection, and thermal protection. In addition, high-performance ESD protection circuits are implemented on all chip ports, ensuring extremely high reliability.

• Simple peripheral circuit, no external MOS required
• Supports 2.0A@5V synchronous switching charging input
• Supports 2.4A@5V synchronous switching boost output
• Low standby current, approx. 60uA
• Selectable full-charge voltage
• Soft-start function
• Trickle/constant current/constant voltage three-stage charging
• Automatic battery boost supply upon input power loss
• Overall boost efficiency up to 94%@2.4A
• OUT output overcurrent and short-circuit protection
• Automatic load detection and startup
• No-load detection shutdown
• Output line compensation
• Fast full-charge function
• Multiple button modes selectable
• Optional flashlight current expansion function
• 1–4 LED battery level display with multiple display modes
• Multiple battery level curves selectable
• Package: eSOP8L

• Power banks
• Other portable devices