background image

EV2637-R-00A –2.5A SINGLE-CELL SWITCH MODE BATTERY CHARGER  

 

EV2637-R-00A Rev. 1.1   

www.MonolithicPower.com 

2

 

11/13/2017 

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 

Preliminary Specifications Subject to Change 

© 2017 MPS. All Rights Reserved. 

EV2637-R-00A EVALUATION BOARD 

(L × W × H) 6.1cm × 5.1cm × 1.3cm 

Board Number 

MPS IC Number 

EV2637-R-00A MP2637GR 

 

EVALUATION BOARD SCHEMATIC 

1

2

LED1

2K

R9

1

2

LED2

2K

R10

1

2

LED3

2K R11

47.5K 1%

RISET

2

1

100nF

CTMR

16.5K 1%

RILIM

JP1

JP2

VCC

10K

R6

10K

R7

5.1K 1%

R4

VIN

PGND

22uF

2

1

CIN

1uF

2

1

C1

VCC

AGND

1uF

C2

100nF

2

1

C4

22uF

2

1

CSYS

31.6K 1%

R1

10K 1%

R2

53.6K

ROLM

2.2uH

1

2

L1

20m

RS1

SYS

2

1

22uF

C3

2

1

22uF

CBATT

BATT

10K 1%

RT1

10K 1%

RT2

NTC

10K

1

2

R5

1

1

2

2

3

3

JP3

PGND

VIN

SW

VCC

FB

SYS

LED

VBATT

NC

2

1

C5

NC

2

1

C6

22uF

2

1

C7

1

1

2

2

3

3

JP4

15K

R3

23.7K

RH

5.1K 1%

RL

2

1

NC

C8

SYS

VBATT

SYS

SYS

VCC

0

RT

VIN

20

VCC

16

ILIM

15

PWIN

14

TMR

13

REG

12

ACOK

11

FB

10

NTC

9

ISET

8

OLIM

7

AG

ND

6

VB

17

BATT

5

CSP

4

BOOST

3

CHG

2

PGN

D

1

 ,2

3

 ,2

4

SW

22

SY

S
SY

S

MODE

19

EN

18

21

MP2637

*

MP2637

NC

2

1

C9

NC

2

1

C10

NC

2

1

C11

 

Summary of Contents for EV2637-R-00A

Page 1: ...t mode To guarantee safe operation the EV2637 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 5 6 V Charge Full Voltage VBATT Full 4 2 4 35 V Charge Current ICHG 2 5 A I...

Page 2: ...3 2K R11 47 5K 1 RISET 2 1 100nF CTMR 16 5K 1 RILIM JP1 JP2 VCC 10K R6 10K R7 5 1K 1 R4 VIN PGND 22uF 2 1 CIN 1uF 2 1 C1 VCC AGND 1uF C2 100nF 2 1 C4 22uF 2 1 CSYS 31 6K 1 R1 10K 1 R2 53 6K ROLM 2 2uH 1 2 L1 20m RS1 SYS 2 1 22uF C3 2 1 22uF CBATT BATT 10K 1 RT1 10K 1 RT2 NTC 10K 1 2 R5 1 1 2 2 3 3 JP3 PGND VIN SW VCC FB SYS LED VBATT NC 2 1 C5 NC 2 1 C6 22uF 2 1 C7 1 1 2 2 3 3 JP4 15K R3 23 7K RH ...

Page 3: ... C10 C1 1 NC Ceramic Capacitor 16V X7R 0603 1 CIN 22μF Ceramic Capacitor 25V X5R 1206 murata GRM31CR61E226KE15 1 L1 2 2μH Inductor 2 2uH 9m 7 2A SMD muRata LQH88PN2R2N38 2 LED2 LED3 BL HUF35A TRB LED Red 0805 BRIGHT LED BL HUF35A TRB 1 LED1 BL HGB35A TRB LED Green 0805 BRIGHT LED BL HGB35A TRB 1 R1 31 6kΩ Film Resistor 1 0603 Yageo RC0603FR 0731K6L 3 R2 RT1 RT2 10kΩ Film Resistor 1 0603 Yageo RC06...

Page 4: ...icPower com 4 11 13 2017 MPS Proprietary Information Patent Protected Unauthorized Photocopy and Duplication Prohibited Preliminary Specifications Subject to Change 2017 MPS All Rights Reserved PRINTED CIRCUIT BOARD LAYOUT Figure 1 Top Silkscreen Layer Figure 2 Top Layer Figure 3 Bottom Layer ...

Page 5: ...21 5kΩ 2 REG Voltage When the input power source is not sufficient to support both the charge current and system load current the charge current is reduced to allow priority of system power and maintain the input voltage avoid dropping further The REG pin is the input voltage regulation feedback The input voltage can be regulated by a resistor divider from VIN pin to REG pin to AGND V 4 R 4 R R3 V...

Page 6: ...the charge current is 2 5A a CTMR of 0 1μF provides a tTOTAL_TMR of 2 4 hours Boost Mode 1 System Output Voltage The MODE pin can enable or disable the EV2637 when in boost mode The resistor divider R1 and R2 can adjust the output voltage as per the following equation 2 2 1 2 1 _ R R R V V V REG SYS 6 Select R1 and R2 as 31 6kΩ and 10kΩ respectively for a system voltage of 5V 2 System Output Curre...

Page 7: ...st and ensure the charger s setting doesn t exceed the battery s absolute maximum specifications 3 An oscilloscope A single voltage probe and a single current probe 4 Multi meter Charge Function 1 Connect the jumper EN to H and the MODE to L to shunts 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 pr...

Page 8: ...ized Photocopy and Duplication Prohibited Preliminary Specifications Subject to Change 2017 MPS All Rights Reserved Boost Function 1 Connect the jumper MODE to H and the EN to L with shunts respectively 2 Attach the load to the SYS and GND terminals respectively 3 Attach the positive and negative ends of the battery to the BATT and GND terminals respectively If it s a battery simulator please pres...

Reviews: