MPS MP2625GL Schematics

MP2625

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2A Switching Charger with NVDC

Power Path Management

For Single Cell Li+ Battery

DESCRIPTION

The MP2625 is a monolithic switch mode battery charger with power path management for single-cell Li-ion batteries in a wide range of tablet and other portable devices. It integrates a synchronous BUCK regulator to provide regulated voltage for powering the system output and at the same time charging the battery. This device supports both USB and high power DC adapter input. In USB mode, the input current limit can be programmed to 450mA or 825mA via the logic pins to cover the USB2.0 and USB3.0 specifications. When the adapter input is present, the input current can also be limited in order to avoid overloading of the DC adapter. Input current limit can be programmed up to 2A.

The smart power path management allows MP2625 to regulate the system voltage for powering an external load and charging the battery independently and simultaneously. This allows immediate system operation even under missing or deeply discharged battery. When the input current limit is reached, the system load is satisfied in priority, then the charger will take the remaining current to charge the battery. Additionally, the smart power path control allows an internal connection from battery to the system in order to supplement additional power to the load in the event the system power demand increases over the input limited power or the input is removed.

FEATURES

 4V to 14V Operating Input Voltage  Smart Power Path Management  Five Control Loops: Input Current Limit,

Input Voltage Limit, Constant Charge Current, Terminal Battery Control and Thermal Fold-Back.

 1.6MHz Switching Frequency  Programmable Input Current Limit  Programmable Charge Current  Single Input for USB and AC adapter  Cover USB2.0 and USB3.0 Input

Specification

 Fully Integrated Power Switches  No External Blocking Diode and Sense

Resistor Required

 Charging Operation Indicator  Built-in Programmable Charging Timer  Thermal Limiting Regulation on Chip  Battery Temperature Monitor  Tiny Package Features Small Size

APPLICATIONS

 Smart Phone  E-Book  GPS  Portable Media Player  Portable Hand-held Solution  Tablet PC

The MP2625 features high integration with all the power switches included inside. No external MOSFET, blocking diodes, or current sense resistor is required.

Two status monitor output pins are provided to indicate the battery charge status and power source status. Other features include trickle charge, battery temperature monitoring, timer and thermal limiting regulation on chip.

MP2625 is available in QFN 3mmx4mm package.

MP2625 – SINGLE CELL SWITCHING CHARGER WITH POWER PATH CONTROL

TYPICAL APPLICATION

MP2625 – SINGLE CELL SWITCHING CHARGER WITH POWER PATH CONTROL

Part Number*

Package

Top Marking

MP2625GL

QFN 3mmx4mm

MP2625

TOP VIEW

TMR

1

2

3

16

15

14

11

7 8 9 10

20

19

18

17

ILIM

PGND

EN

NTC

ISET

CHGOK ACOK

VCC

BST

VLIM

M0 M1

SYS

BATT

6

4

5

13

12

AGND

IN

SW

SYSFB

Notes:

1) Exceeding these ratings may damage the device.

2) The maximum allowable power dissipation is a function of the maximum junction temperature TJ (MAX), the junction-to-

ambient thermal resistance θ

JA

, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD (MAX) = (T

J

(MAX)-T

A

)/θ

JA

. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage.

3) The device is not guaranteed to function outside of its operating conditions.

4) Measured on JESD51-7, 4-layer PCB.

ORDERING INFORMATION

* For Tape & Reel, add suffix –Z (e.g. MP2625GL–Z);

PACKAGE REFERENCE

ABSOLUTE MAXIMUM RATINGS

IN, SW ........................................ -0.3V to +20V

BATT, SYS .................................... -0.3V to +6V

BST ............................................. -0.3V to +26V

All Other Pins ................................. -0.3V to +6V

Continuous Power Dissipation (TA = +25°C)

QFN20 3mmx4mm .................................... 2.6W

Junction Temperature .............................. 150C

Lead Temperature ................................... 260C

Storage Temperature.................–65°C to 150°C

Recommended Operating Conditions

Supply Voltage VIN .......................... 4.5V to 12V

Operating Junction Temp. (TJ) .... -40°C to +125°C

(1)

Thermal Resistance

(4)

θ

JA

θ

JC

QFN20 3mmx4mm ................. 48 ...... 11 ... C/W

(2)

(3)

MP2625 – SINGLE CELL SWITCHING CHARGER WITH POWER PATH CONTROL

Parameters

Symbol

Condition

Min

Typ

Max

Units

Input Power (IN)

IN Operating Range

VIN

4.0

14

(5)

V

IN Under Voltage Lockout Threshold

Rising

3.65

3.8

3.95

V

Falling

3.35

3.5

3.65

V

IN vs. BATT Threshold Rising

270

310

350

mV

Falling

70

110

150

mV

BST Voltage Threshold

V

BST-VSW

Rising

2.75

2.9

3.05

V

Falling

2.6

2.75

2.9

V

Switching Frequency

1.4

1.6

1.8

MHz

Input Current Limit

IIN

USB2.0 Mode

400

450

500

mA

USB3.0 Mode

750

825

900

mA

Default Mode

1840

2000

2160

mA

Programmable Mode, R

ILIM

=23k

1840

2000

2160

mA

Input Current Limit Reference Voltage

V

ILIM

1.1

1.14

1.18

V

High-side NMOS On Resistance

R

H_DS(ON)

Include the BLOCK FET

120

130

mΩ

Low-side NMOS On Resistance

RL_

DS(ON)

80

100

mΩ

High-side NMOS Peak Current limit

3 4 5 A Input Voltage Clamp Threshold

V

VLIM

Voltage on VLIM

1.49

1.52

1.55

V

Input Quiescent Current

IIN

Charger Enabled, USB2.0 Mode

2.4 5 mA

Charger Enabled, USB3.0 Mode

2.8 5 mA

Charger Enable, Programmable Mode

3.8 5 mA

Charger Enabled, Default Mode

3.8 5 mA

Disabled, EN=0V

3 5

uA

SYS to IN reverse current blocking

SYS=SW=4.5V,VIN=0V, monitor VIN leakage

0.01

0.2

uA

SYS Output

Minimum SYS Regulation Voltage

V

SYS

SYS voltage @ V

BATT

≤3.4V,

SYSFB float

3.45

3.6

3.75

V

SYS Regulation Voltage

V

SYS

3.4V<V

BATT

≤4.2V, SYSFB float

BATT Float

3.5

V

BATT

+

0.2V

4.5

V

User Programmed by SYSFB

3.5

4.4

V

SYS Reference Voltage

V

SYS_REF

1.135

1.152

1.170

V

ELECTRICAL CHARACTERISTICS

VIN = 5.0V, TA = 25C, unless otherwise noted.

MP2625 – SINGLE CELL SWITCHING CHARGER WITH POWER PATH CONTROL

Parameters

Symbol

Condition

Min

Typ

Max

Units

BATT to SYS Resistance

VIN=0V, I

SYS

=200mA,

V

BATT

=4.2V

0.04

0.05

Ω

BATT to SYS Current Limit V

SYS>VBATT

–800mV

3 A

SYS short

200

mA

Battery Charger

Terminal Battery Voltage

V

BATT

V

BATT>VRECH

, I

CHG≤IBF,

SYSFB float

4.168

4.2

4.232

V

SYS

<4.2V Programmed

by SYSFB Pin

V

SYS

-

0.04 x IBF

V

Recharge Threshold at V

BATT

V

RECH

SYSFB Float

3.9

4.0

4.1

V

SYSFB programmed

3.85

3.95

4.05

V

Recharge Hysteresis

85

mV

Trickle Charge Threshold

2.9 3 3.1

V

Trickle Charger Hysteresis

200

mV

Trickle Charge Current

I

TRICKLE

10%

ICC

Termination Charger Current

IBF

5%

10%

15%

ICC

IBF Maximum Limit

150

200

mA

Constant Current Mode Charge Current

ICC

R

ISET

=1.05k

1.8

2.0

2.2

A

R

ISET

=1.53k

1.26

1.4

1.54

A

R

ISET

=4.6k

0.405

0.45

0.495

A

ISET Reference Voltage

1.1

1.15

1.2

V

Battery UVLO Rising

2.4

2.6

2.8 V

Falling

2.2

2.4

2.6

V

Idea Diode Regulation Voltage

V

SYS

Supplement Mode

V

BATT

-

65mV

mV

BATT Leakage Current

I

BATT

V

BATT

=4.2V, SYS float,

VIN=PGND

20

30

µA

ACOK

__________

, CHGOK

_____________

ACOK

__________

, CHGOK

_____________

Pin Output Low

Voltage

Sinking 5mA

270

350

mV

ACOK

__________

,CHGOK

_____________

Pin Leakage Current

Connected to 3.3V

0.1

0.5

uA

Timer

Trickle Charge Time

C

TMR

=0.1µF, I

CHG

=1A

45

Min

Total Charge Time

C

TMR

=0.1µF, I

CHG

=1A

6.5

Hour

ELECTRICAL CHARACTERISTICS (continued)

VIN = 5.0V, TA = 25C, unless otherwise noted.

MP2625 – SINGLE CELL SWITCHING CHARGER WITH POWER PATH CONTROL

Parameters

Symbol

Condition

Min

Typ

Max

Units

Negative Temperature Coefficient (NTC) Control

NTC Low Temp Rising Threshold

V

THL

R

NTC

=NCP18XH103F

0°C

63

65

67

%VCC

Hysteresis on Low Temp Threshold

35 mV

NTC High Temp Falling Threshold

V

THH

R

NTC

=NCP18XH103F,

50°C

32

33.5

35

%VCC

Hysteresis on High Temp Threshold

70 mV

VCC Supply

VCC UVLO Rising

3.15

3.35

3.55

V

Falling

2.8 3 3.2

V

VCC Output Voltage

0mA<I

VCC

<25mA,

VIN=6V

4.3

4.5

4.6

V

VCC Short Circuit Current Limit

40 mA

Logic

EN

Input Low Voltage

0.4

V

EN

Input High Voltage

1.5

V

EN

Input Current

EN

=4V

4 8

μA

EN

=0V

-0.5

-0.1

M0, M1 Logic High

1.5

V

Logic Low

0.4

V

Protection

Thermal Limit Temperature

120 °C

Thermal Shutdown

150 °C

ELECTRICAL CHARACTERISTICS (continued)

VIN = 5.0V, TA = 25C, unless otherwise noted.

Notes:

5) Using a inductor with the saturation current larger than 6A when applying the part with higher than 12V input.

MP2625 – SINGLE CELL SWITCHING CHARGER WITH POWER PATH CONTROL

TYPICAL PERFORMANCE CHARACTERISTICS

VIN = 5.0V, V V

Clamp=4.5V, L = 1.2 µH, TA = +25ºC, unless otherwise noted.

IN

= Full Range, Default Mode, IIN Limit=2A, V

BATT

SYS

=4.4V, R6 and R7 are float, I

CHG

=2A,

MP2625 – SINGLE CELL SWITCHING CHARGER WITH POWER PATH CONTROL

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

VIN = 5.0V, V V

Clamp=4.5V, L = 1.2 µH, TA = +25ºC, unless otherwise noted.

IN

= Full Range, Default Mode, IIN Limit=2A, V

BATT

=4.4V, R6 and R7 are float, I

SYS

CHG

=2A,

MP2625 – SINGLE CELL SWITCHING CHARGER WITH POWER PATH CONTROL

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

VIN = 5.0V, V L = 1.2 µH, TA = +25ºC, unless otherwise noted.

= Full Range, Default Mode, IIN Limit=2A, V

BATT

=4.4V, R6 and R7 are float, I

SYS

CHG

=2A,

MPS MP2625GL Schematics

Specifications and Main Features

Frequently Asked Questions

User Manual