DocID025515 Rev 1

17/19

AN4397

Board description

19





GND: system ground.

The MPPT function can be disabled by pulling up the pin MPP-SET and unsoldering the

resistor R2. In this case the duty cycle of the switching converter will be regulated according

to the fixed end of charge voltage connected to the J3.

Table 5. CN3 connector

CN4 pin number

12

SPV1050 pin signal

STORE

GND

Table 6. J1, J2, J3: enable/disable MPPT

J1

J2

J3

Function

LEAVE IT OPEN

(signal monitoring)

OPEN: MPPT ENABLED

CLOSE: MPPT

1. The R2 must be unsoldered.

LEAVE OPEN IF J2 IS OPEN.

CONNECT TO EXTERNAL

REFERENCE VOLTAGE IF J2 is

CLOSED

Table 7. SW1, SW2: enable/disable LDOs

SW1

SW2

Function

CLOSE 3 - 4: LDO1 DISABLED

CLOSE 2 - 3: LDO1 ENABLED

FLOATING: EXTERNAL CONTROL BY

CN3

CLOSE 3 - 4: LDO2 DISABLED

CLOSE 2 - 3: LDO2 ENABLED

FLOATING: EXTERNAL CONTROL BY

CN3