TOP POWER ASIC TP5410

TP5410 is a dedicated power bank single-cell lithium-ion battery charger and constant 5V boost controller. The charging section integrates high-precision voltage and charge current regulation, pre-charge, charge status indication, and charge termination functions, capable of delivering a maximum charging current of 1A. The boost circuit employs a VFM switching DC/DC boost converter fabricated with CMOS technology, featuring extremely low no-load current. It offers very low no-load power consumption (less than 10µA), with a boost output drive current capability of up to 1A. No external button is required, enabling plug-and-play operation.

The charging section uses a linear step-down topology with a built-in PMOSFET and reverse current protection circuit, eliminating the need for external sense resistors and isolation diodes. Thermal feedback automatically adjusts the charging current to limit the die temperature during high-power operation or under high ambient temperature conditions. The full-charge voltage is fixed at 4.2V. The charging current can be externally set via a single resistor. When the battery reaches 4.2V, the charging current gradually decreases to 1/5 of the programmed current value, at which point TP5410 automatically terminates charging. The boost section also integrates a power NMOSFET; its low on-resistance provides drive capability up to 5V/1A. The high level of integration allows TP5410 to operate normally with minimal external components. TP5410 also integrates charge temperature protection and a boost input power current-limiting loop that dynamically adjusts current according to load conditions, along with fast response and over-current shutdown functionality. The boost converter operates in variable-frequency mode, resulting in significantly lower no-load power consumption, lower ripple, stronger drive capability, and higher efficiency compared to similar products both domestically and internationally.

• Programmable charge current up to 1000mA (typical), maximum 1.2A
• Boost output current up to 1A (Vbat = 3.3V), maximum 1.5A (Vbat = 3.8V)
• Automatic frequency adjustment (VFM) adapts to varying boost loads (5V no-load standby current < 10uA); no push-button startup required; auto boost shutdown at low battery voltage (< 2.7V)
• Dedicated circuit for single-cell Li-ion power bank applications
• High boost efficiency: 88% (Typ), maximum 92%
• Constant current/constant voltage operation with thermal regulation for maximizing charge rate without risk of overheating
• 4.2V preset charge voltage with ±1% accuracy
• 5V preset boost accuracy with ±2.5% accuracy; 5V output fine-tunable via external resistor
• Maximum input up to 10V
• 2 charge status indicators: open-drain output LED drive
• C/5 charge termination current
• Trickle charge at C/5 below 2.9V
• Charge soft-start to reduce inrush current
• No MOSFET, sense resistor, or isolation diode required
• 8-pin ESOP thermally enhanced package

• Power bank
• Portable devices