FEATURES

● 3.9V to 13.5V Operating Input Voltage Range

● Up to 22V Sustainable Voltage

● High Efficiency, 1.5MHz, Synchronous Buck Charger

 93.8% Charge Efficiency at 1.02A from 5V Input

 89.8% Charge Efficiency at 2A from 9V Input

 Optimized for 9V/12V Input

 Selectable PFM Mode for Light Load Efficiency

● USB On-The-Go (OTG) Support (Boost Mode)

 Boost Converter with up to 1.2A Output

 Boost Efficiency of 93.5% at 0.5A and 92.2% at 1A

 Accurate Hiccup Mode Over-Current Protection

 Soft-Start Capable with up to 500μF Capacitive Load

 Output Short-Circuit Protection

 Selectable PFM Mode for Light Load Operations

● Programmable Input Current Limit (IINDPM) and

Dynamic Power Management to Support USB

Standard Adaptors

● Maximum Power Tracking by Programmable Input

Voltage Limit (VINDPM) with Selectable Offset

● Auto Detect USB BC1.2, SDP, CDP, DCP and

Non-Standard Adaptors

● High Battery Discharge Efficiency with 26mΩ Switch

● Narrow Voltage DC (NVDC) Power Path Management

 Instant-On with No or Highly Depleted Battery

 Ideal Diode Operation in Battery Supplement Mode

● Ship Mode, Wake-Up and Full System Reset Capability

by Battery FET Control

● Flexible Autonomous and I2

C Operation Modes for

Optimal System Performance

● Fully Integrated All MOSFETs, Current Sense and

Compensation

● 2.5μA Ship Mode Low Battery Leakage Current

● High Accuracy

 ±0.6% Charge Voltage Regulation (8mV/Step)

 ±5% Charge Current Regulation at 1.38A

 ±10% Input Current Regulation at 0.9A

● Safety

 Battery Temperature Sensing (Charge/Boost Modes)

 Thermal Regulation and Thermal Shutdown

 Input Under-Voltage Lockout (UVLO)

 Input Over-Voltage (ACOV) Protection

APPLICATIONS

Smart Phones, EPOS

Portable Internet Devices and Accessory

GENERAL DESCRIPTION

The SGM41515/SGM41515A/SGM41515D are battery

chargers and system power path management devices with

integrated converter and power switches for using with

single-cell Li-Ion or Li-polymer batteries. This highly

integrated 3A device is capable of fast charging and supports

a wide input voltage range suitable for smart phones, tablets

and portable systems. I2

C programming makes it a very

flexible powering and charger design solution.

The devices include four main power switches: input reverse

blocking FET (RBFET, Q1), high-side switching FET for Buck

or Boost mode (HSFET, Q2), low-side switching FET for Buck

or Boost mode (LSFET, Q3) and battery FET that controls the

interconnection of the system and battery (BATFET, Q4). The

bootstrap diode for the high-side gate driving is also

integrated. The internal power path has a very low impedance

that reduces the charging time and maximizes the battery

discharge efficiency. Moreover, the input voltage and current

regulations provide maximum charging power delivery to the

battery with various types of input sources.

A wide range of input sources are supported, including

standard USB hosts, charging ports and USB compliant high

voltage adaptors. The default input current limit is

automatically selected based on the built-in USB interface.

This limit is determined by the detection circuit in the system

(e.g. USB PHY). The SGM41515/SGM41515A/SGM41515D

are USB 2.0 and USB 3.0 power specifications compliant with

input current and voltage regulation. It also meets USB

On-The-Go (OTG) power rating specification and is capable

of boosting the battery voltage to supply 5.15V on VBUS with

1.2A (or 0.5A) current limit.

The system voltage is regulated slightly above the battery

voltage by the power path management circuit and is kept

above the programmable minimum system voltage (3.5V by

default). Therefore, 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

power path management provides the deficit from battery by

discharging battery to the system until the system power

demand is fulfilled. This is called supplement mode, which

prevents the input source from overloading.

Starting and termination of a charging cycle can be

accomplished without software control. The sensed battery

voltage is used to decide for starting phase of charging in one

of the three phases of charging cycle: pre-conditioning,

constant current or constant voltage. When the charge

current falls below a preset limit and the battery voltage is

above recharge threshold, the charger function will

automatically terminate and end the charging cycle. If the

voltage of a charged battery falls below the recharge

threshold, the charger begins another charging cycle.

Several safety features are provided in the SGM41515/

SGM41515A/SGM41515D such as over-voltage and

over-current protections, battery temperature monitoring,

charging safety timing, thermal shutdown and input UVLO.

TS pin is connected to an NTC thermistor for battery

temperature monitoring and protection in both charge and

Boost modes according to JEITA profile. This device also

features thermal regulation in which the charge current is

reduced, if the junction temperature exceeds 80℃ or 120℃

(selectable).

Charging status is reported by the STAT output and

fault/status bits. A negative pulse is sent to the nINT output

pin as soon as a fault occurs to notify the host. BATFET reset

control is provided by nQON pin to exit ship mode or for a full

system reset.

The SGM41515/SGM41515A/SGM41515D are available in a

Green TQFN-4×4-24L package.