FEATURES

● 1- to 4-Cell Charging from a Variety of Input Types

 3.58V to 24V Input Operating Voltage Range

 USB 2.0/3.0/3.1 (Type-C)/USB PD Input Current

Support

 Seamless Buck ↔ Buck-Boost ↔ Boost

Transitions

 Input Overload Protection (IDPM and VDPM

Regulation)

● CPU Throttling, Power and Current Monitoring

 Full nPROCHOT Profile

 Input Current Monitoring

 Battery Charge/Discharge Current Monitoring

 System Power Monitoring

● Narrow Voltage DC (NVDC) Power Path Management

 Instant-On with Depleted or No Battery

 Battery Supplementation if Adapter is Fully Loaded

 BATFET Ideal Diode Emulation in Supplement

Mode

● Power-Up USB Port from Battery (USB OTG)

 3V to 20.56V Adjustable OTG Voltage with 8mV

Resolution

 Up to 6.35A Output Current Limit with 50mA

Resolution

● Pass Through Mode (PTM) to Improve Efficiency

● VMIN Active Protection (VAP) Mode

● VAP Supplements Battery from Input Caps for System

Power Spikes (Battery-Only Conditions)

● Input Current Optimizer Maximizes Power Extraction

● 800kHz or 1.2MHz Selectable Switching Frequency

● SMBus Interface for Flexible System Configuration

● Input Current Limit Setting Pin (without SMBus)

Integrated ADC for Voltage/Current/Power Monitoring

● Low Battery Quiescent Current

● High Accuracy

 ±0.4% for Charge Voltage Regulation

 ±2% for Input/Charge Current Regulation

 ±2% for Input/Charge Current Monitor

 ±5.8% for Power Monitor

● Safety

 Thermal Shutdown

 Input/System/Battery Over-Voltage Protection

 Input/MOSFET/Inductor Over-Current Protection

● Available in a Green TQFN-4×4-32AL Package

APPLICATIONS

Bluetooth Speakers, Drones, IP Cameras, Detachable Power

Supply

Portable Internet Devices and Accessory

Industrial and Medical Equipment

GENERAL DESCRIPTION

The SGM41570 is a synchronous Buck-Boost battery charge

controller with NVDC power path management. It can provide

high efficiency and low component count solution for 1-cell to

4-cell batteries charging applications.

The system is regulated slightly to be higher than the battery

voltage, but not lower than the programmable system

minimum voltage. Therefore, the system power is maintained

even if the battery is completely depleted or removed.

Dynamic power management (DPM) feature is also included

that automatically reduces the charge current if the input

current or voltage limit is reached. If the system load

continues to increase after reduction of charge current down

to zero, the battery enters the supplement mode and both

adapter and battery power the system.

A wide range of input sources are supported for SGM41570,

including traditional adapters, USB adapter and high voltage

USB PD sources. The converter is configured as Buck, Boost

or Buck-Boost during power-up, depending on the input

source and battery conditions. The charger automatically

switches among Buck, Boost and Buck-Boost without host

control.

When the input source is absent, the SGM41570 can work in

USB On-The-Go (OTG) mode to supply VBUS from battery.

The OTG output voltage can be programmed from 3V to

20.56V with 8mV resolution. The slew rate of the output

voltage transitions in OTG can be configured (by OTG current

setting) to comply with the USB PD 3.0 PPS specifications.

If there is no external load on the USB OTG port and the

system is powered by battery-only, the VMIN Active Protection

(VAP) feature is supported. In VAP, the VBUS voltage is

charged up by the battery and the energy is stored in the

input decoupling capacitors. When the system requires peak

power spike, the charge stored on the input capacitor

discharges to maintain the system voltage at minimum

system voltage.

Adapter current, battery current and system power are

monitored in SGM41570. When the system power is too high

and exceeds available power from adapter and battery

together, a flexibly programmed nPROCHOT pulse is

asserted to inform CPU for throttle back.