MPS EV2690-R-00A Bedienungsanleitung

EV2690-R-00A

Evaluation Board of All-in-one 2.5A

Battery Charge and 2.1A Boost Discharge

EV2690-R-00A Rev. 1.0 www.MonolithicPower.com 1

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The Future of Analog IC Technology

DESCRIPTION

The EV2690-R-00A is the evaluation board

designed to demonstrate the capabilities of

MPS’ MP2690, a highly-integrated, flexible

switch-mode battery charge management for a

single-cell Li-ion and Li-Polymer battery used in

a wide range of applications.

EV2690 uses two operating modes—charge

mode and boost mode—to allow management

of system and battery power based on the state

of the input.

When input power is present, the board

charges a single-cell battery with a

programmable charge current of up to 2.5A.

In the absence of an input source, the board

switches to boost mode through the PB pin to

power the SYS pins from the battery with a

current of up to 2.1A.

The evaluation board provides 4-LED to

achieve the voltage based fuel gauge indication

and distinguish charge mode from boost mode.

To guarantee safe operation, the EV2690 has

input-over-voltage protection, battery over-

voltage protection, thermal shutdown, battery-

temperature monitoring, and a programmable

timer to prevent prolonged charging of a dead

battery.

ELECTRICAL SPECIFICATION

Parameter Symbol Value Units

Charge Mode

Input Voltage Range VIN 4.55 – 6 V

Charge-Full Voltage VBATT_Full 4.2 / 4.35

/ 4.45 V

Charge Current ICHG 2.5 A

Input Current Limit IIN_LIM 2.7 A

Boost Mode

Battery Voltage VBATT 3-4.5 V

SYS Voltage

Regulation

VSYS 5 V

SYS Output Current

Limit

ISYS 2.1 A

FEATURES

4.55V-to-6V Operating Input Voltage Range

Power Management Function Integrated

Input-Current-Limit and Input Voltage

Regulation

Up to 2.5A Programmable Charge Current

Selectable 4.45V / 4.35V / 4.2V Charge

Voltage with 0.5% Accuracy

Battery Temperature Monitoring

4-LED for battery fuel gauge indication

Programmable Timer Back-Up Protection

Battery-Reverse-Leakage Blocking

Reverse-Boost-Operation for Powering

System

Up to 94% 5V Boost Mode Efficiency @

2.1A with BATT=4.5V

Up to 2.1A Programmable Output Current

Limit in Boost Mode

APPLICATIONS

Sub-battery Applications

Power-bank Applications for Smart-Phone,

Tablet and Other Portable Devices

All MPS parts are lead-free, halogen free, and adhere to the RoHS

directive. For MPS green status, please visit MPS website under Quality

Assurance.

“MPS” and “The Future of Analog IC Technology” are Registered

Trademarks of Monolithic Power Systems, Inc.

EV2690-R-00A – 2.5A CHARGER, 2.1A BOOST DISCHARGE, ALL-IN-ONE

EV2690-R-00A Rev. 1.0 www.MonolithicPower.com 2

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EV2690-R-00A EVALUATION BOARD

(L x W x H) 2.5” x2.5”x 0.063”

(6.35cm x 6.35cm x 0.16cm)

Board Number MPS IC Number

EV2690-R-00A MP2690GR

EVALUATION BOARD SCHEMATIC

ISET

DP2 11

VIN

VNTC

LED4 23

3,4

SYS

NTC 19

TC 8

VCC

AGND

OLIM

PB 12

DM2 10

TMR 13

PGND 1

ILIM

MP2690GR

CSP 22

LED3 24

LED2 25

LED1 26

BATT 21

DM1

DP1

SW 2

22uF

1uF

100nF

VCC

JP2

14.7K

RILIM

C13

100nF

2 1

CTMR

2K R7

2K R8

2K R9

2K R10

1 2

LED1

1 2

LED2

LED3

1 2

LED4

Vpull-up

VCC

20mRS2

2.2uH

22uF

C10

2 1

1uF C11

10K

RT1

10K

RT2 VNTC

VNTC NTC

LEDTC 2K R6

VBATT

SW1

VBUS

D-

D+

GND

USB

22uF

1uF

2 1

1uF

VIN

VSYS

VBATT

PGND

VNTC

VNTC 200K

54.9K

R11

Load in detect

Vpull-up

20m

RS1

60.4K

RISET

71.5K

ROLIM

NTC

VBUS 1

D- 2

D+ 3

ID 4

GND 5

microUSB

PGND

22uF

C12

22uF

JP1

VCC Vpull-up

SDP1

SDP2

DCP

15K

200

DM1

DP1

DM1

DP1

VIN

VSYS

1, 2, 3

5, 6, 7, 8

2 1

C14

EV2690-R-00A – 2.5A CHARGER, 2.1A BOOST DISCHARGE, ALL-IN-ONE

EV2690-R-00A Rev. 1.0 www.MonolithicPower.com 3

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EV2690-R-00A BILL OF MATERIALS

Qty Ref Value Description Package ManufactureManufacture_PN

1 D1 B130LAW Schottky;30V;1A SOD-123 B130LAW-7

2 RS1, RS2 20m Resistor;1%; 2512 Yageo RL2512FK-070R02L

1 R1 200 Film Resistor;1% 0603 Yageo RC0603FR-07200RL

1 RISET 60.4k Film Resistor;1% 0603 Yageo RC0603FR-0760K4L

1 ROLIM 71.5k Film Resistor;1% 0603 Yageo RC0603FR-0771K5L

2 R2, R3 15k Film Resistor;1%; 0603 Yageo RC0603FR-0715KL

1 RILIM 14.7k Film Resistor;1% 0603 Yageo RC0603FR-0714K7L

2 RT1, RT2 10k Film Resistor;1%; 0603 Yageo RC0603FR-0710KL

C13, C14 NC

5 C2, C5, C6,

C10, C12 22μF Ceramic Capacitor;25V;X5R; 1206 muRata GRM31CR61E226KE15

1 R5 200k Film Resistor;1% 0603 Yageo RC0603FR-07200KL

1 R11 54.9k Film Resistor;1% 0603 Yageo RC0603FR-0754K9L

6 R4, R6, R7, R8,

R9, R10 2k Film Resistor;1% 0603 LIZ CR0603JA0202G

6 C3, C4, C7, C8,

C9, C11 1μF Ceramic Capacitor;25V;X7R 0603 TDK C1608X7R1E105K

2 C1, CTMR 100nF

Ceramic

Capacitor;16V;X7R;0603 0603 TDK C1608X7R1C104K

1 LEDTC CB-

482QWC LED; WLED,20mA, DIP2

4 LED1, LED2,

LED3, LED4

BL-

HGE35A-

TRB

LED; Green 0805 BRIGHT LEDBL-HGE35A-TRB

1 M2

AM4825P-

T1 P-Channel MOSFET; -30V; SO-8 Analog

Power AM4825-T1-PF

1 M1 AM2336N N-Channel MOSFET; 30V; SOT-23 Analog

Power AM2336N

VIN,PGND,

VBATT,

PGND,VSYS,

PGND

2mm terminal

4 DCP, JP1,

SDP1, SDP2 Jumper, 2.54mm

1 L1 2.2μH Inductor;2.2uH;0.173m;8.2A SMD TDK SPM6530T-2R2M

1 U1

Micro-USB

receptacle

1 U2 MP2690 IC QFN26 4*4 MPS MP2690GR

1 U3

USB A-type

receptacle

1 SW1

Push

Switching

button

Button; SM 4x10mm;1.5mm

Height

EV2690-R-00A – 2.5A CHARGER, 2.1A BOOST DISCHARGE, ALL-IN-ONE

EV2690-R-00A Rev. 1.0 www.MonolithicPower.com 4

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PRINTED CIRCUIT BOARD LAYOUT

Figure 1: Top Silkscreen Layer Figure 2: Top Layer

Figure 3: Bottom Layer

EV2690-R-00A – 2.5A CHARGER, 2.1A BOOST DISCHARGE, ALL-IN-ONE

EV2690-R-00A Rev. 1.0 www.MonolithicPower.com 5

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QUICK START GUIDE

This board is designed for the MP2690, a stand-alone switch-mode battery charge management and

system power path management device with integrated reverse directional boost from BATT to SYS.

The board’ layout accommodates most commonly-used capacitors. The default function of this board is

preset at charge mode, and the charge full voltage is preset to 4.35V for a 1-cell Li-Ion battery.

Charge Mode Setting

1. Input Current Limit

An input current limit can be set slightly below the input source’s maximum current rating. When the

input current hits this limit, the charge current will decrease to keep the input current constant at the

limit value to initially power the system. RILIM—the resistor connected to the ILIM pin—programs this

limit. To set the input current limit at 2.7A, use a RILIM of 14.7kΩ.







ILIM

40(k )

I(A)R(k)

(1)

2. Charge-Full Voltage

To set the charge-full voltage, leave the VB pin floating for 4.2V, connect VB to L for 4.35V and

connect VB to H for 4.45V.

3. Charge Current

The charge current can be programmed via both RS1 and RISET. With given RS1=10mΩ, determine

the charge current using the following formula:





CHG

ISET

1500

I(A)

R(k)RS1(mA)

(2)

For example, for a charge current of 2.5A, use a 60kΩRISET.

Boost Mode

1. System-Output-Current Limit

Set the system-output-current limit in boost mode for the EV2690 to operate like a standard USB

charger. Set the output current limit as the following equation:







OLIM

1500

I(A)

R(k)RS1(m)

(3)

For the other detailed description on the operation of the MP2690, please refer to the datasheet.

EV2690-R-00A – 2.5A CHARGER, 2.1A BOOST DISCHARGE, ALL-IN-ONE

EV2690-R-00A Rev. 1.0 www.MonolithicPower.com 6

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EQUIPMENT REQUIREMENT

Evaluation requires the following equipments:

1. DC power source. The output voltage should exceed 6.0V, and output current greater than 3A.

2. Battery simulator or a single-cell battery pack. The battery simulator’s output rating should

exceed 4.5V/7.0A. When using a real battery pack, please observe all precautions on the

battery manufacturer’s data sheet first and ensure the charger’s setting doesn’t exceed the

battery’s absolute maximum specifications.

3. Oscilloscope. A single voltage probe and a single current probe.

4. Multi-meter.

Charge Function

1 Connect the jumper “VCC”.

2 The jumpers “DCP”, “SDP1” and “SDP2” are used for the input DP1/DM1 detection setting.

Connect “DCP” and leave “SDP1” and ”SDP2” float as default, the DP1/DM1 detection will be

set as DCP, the IINLIMIT is set through RILIM.

Otherwise, only connect “SDP1” and “SDP2”, or leave the 3 jumpers float will set the IINLIMIT =

500mA.

3 Attach the positive and negative ends of the battery to the “BATT” and “GND” terminals,

respectively. If it’s a battery simulator, please preset the voltage to 3.8V (typical value) first.

4 Preset the DC power source to 5.0V. Then attach the DC output port and ground to the “VIN”

and “GND” terminals, respectively.

5 Turn on the DC power source. The charger will start. Use the oscilloscope to verify that the 2.5A

charge current is being delivered to the battery.

Figure 4: Setup for Charge Mode

EV2690-R-00A – 2.5A CHARGER, 2.1A BOOST DISCHARGE, ALL-IN-ONE

NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third

party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not

assume any legal responsibility for any said applications.

EV2690-R-00A Rev. 1.0 www.MonolithicPower.com 7

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Boost Function

1 Attach the load to the “SYS” and “GND” terminals respectively.

2 Attach the positive and negative ends of the battery to the “BATT” and “GND” terminals respectively.

If it’s a battery simulator, please preset the voltage to 3.8V (typical value) firstly.

3 Short push the SW1 button, the boost will start to work. Verify the system output current is limited at

2.1A.

Figure 5: Setup for Boost Mode

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