Datasheet

Setup

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J14 pin 1 is P1.7, pin 2 is P1.6, pin 3 is P1.5 and pin 4 is P1.4 of the TPS65835 MSP430 core. The

functionality of these GPIOs is discussed in the TPS65835 datasheet and the MSP430x2xx family user's

guide.

J15 : J-TAG Connector for USB Programming Tool (MSP-FET430UIF)

J15 is a keyed header for the MSP-FET430UIF USB Programming Tool.

J16 : GPIOs P1.3, P2.2, P2.3, P2.6, P2.7, P3.3, P3.5

J16 pin 1 is P3.5, pin 2 is P3.3, pin 3 is P2.7, pin 4 is P2.6, pin 5 is P2.3, pin 6 is P2.2 and pin 7 is P1.3 of

the TPS65835 MSP430 core. The functionality of these GPIOs is discussed in the TPS65835 datasheet

and the MSP430x2xx family user's guide.

4.2 Jumpers

JP1 : SW_SEL, S1, JP11

JP1 pin 1 is GND, pin 2 is the SW_SEL pin of the TPS65835 and pin 3 is the SYS voltage output of the

TPS65835. Short pins 1 and 2 to use a slide switch on SWICTH pin of TPS65835 or short pins 2 and 3 to

use the installed push-button switch S1 on SWITCH pin of TPS65835.

JP2 : VLDO_SET, 2.2V, 3.0V

JP2 pin 1 is GND, pin 2 is the VLDO_SET pin of the TPS65835 and pin 3 is the SYS voltage output of the

TPS65835. Short pins 1 and 2 to set the LDO output voltage to 2.2V or short pins 2 and 3 to set the LDO

output voltage to 3.0V.

4.3 Test Points

TP1 : When R5 is replaced with a 50-Ω resistor, TP1 is used to inject an AC signal which may be

measured at BST_OUT to verify frequency response and converter stability.

TP2 : When D2 is populated, TP2 can be used to connect a microcontroller GPIO to implement special

push-button power/on power off timing.

5 Setup

Set the first input power supply voltage to 5 V before connecting the EVM then power it off. Connect the

positive lead to J1, VIN. The power supply return lead is connected to J2 GND.

Set the second input power supply (capable of sinking capable of sinking at least 200 mA) to 3.6 V before

connecting to the EVM then power it off. The positive lead is connected to J3, BAT. The power supply

return lead is connected to J4, GND.

Apply 5V to the VIN input.

With JP2-VLDO_SET set to 3.0V, verify with voltmeter that the VLDO output voltage is 3V ± 100 mV.

Position JP2 shorting jumper between VLDO_SET and 2.2V. Verify with voltmeter that the VLDO output

voltage is 2.2V ± 100m V.

Verify that input current is less than 50mA with and input voltage of 5 V.

Verify JP1 is set with S1 and SWITCH shorted, press the push-button (S1) and verify with voltmeter that

the output voltage is 10V ± 1 V.

Verify LCLP is toggling between 10 V ± 1 V and 0V ± 1 V.

Verify LCLN is toggling between 10 V ± 1 V and 0V ± 1 V.

Verify LCRP is toggling between 10 V ± 1 V and 0V ± 1 V.

Verify LCRN is toggling between 10 V ± 1 V and 0V ± 1 V.

Set input voltage supply capable of sinking at least 500mA on BAT to 3.6 V and power on.

Verify that input current is less than 200mA with input voltage of 5 V VIN power supply. Verify D1 lights up

to indicate charging.

TPS65835 System Evaluation Board SLVU486A–July 2011–Revised July 2011

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