Setup
J13 : COMP, GND
J13 pin 1 is GND, pin 2 is the COMP pin of the TPS65735. COMP is the BAT voltage divided down
through an internal resistor divider where VCOMP = 0.5
×
VLDO + 300 mV. This is intended to be an
output to a low voltage microcontroller
J14 : HBL1, HBL2, HBR1, HBR2
J14 pin 1 is HBL1, pin 2 is HBL2, pin 3 is HBR1 and pin 4 is HBR2 of the TPS65735. These are the inputs
to the H-Bridge logic as noted in the datasheet.
4.2
Jumpers
JP1 : SW_SEL, S1, JP11
JP1 pin 1 is GND, pin 2 is the SW_SEL pin of the TPS65735 and pin 3 is the SYS voltage output of the
TPS65735. Short pins 1 and 2 to use a slide switch on SWICTH pin of TPS65735 or short pins 2 and 3 to
use the installed push-button switch S1 on SWITCH pin of TPS65735.
JP2 : VLDO_SET, 2.2V, 3.0V
JP2 pin 1 is GND, pin 2 is the VLDO_SET pin of the TPS65735 and pin 3 is the SYS voltage output of the
TPS65735. 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.
JP3 : CHG_EN, ON, OFF
JP3 pin 1 is GND, pin 2 is the CHG_EN pin of the TPS65735 and pin 3 is VLDO of the TPS65735. Short
pins 1 and 2 to disable the charger or short pins 2 and 3 to enable the charger.
JP4 : SLEEP, HIGH, LOW
JP4 pin 1 is GND, pin 2 is the SLEEP pin of the TPS65735 and pin 3 is VLDO of the TPS65735. Short
pins 1 and 2 to put the TPS65735 in sleep mode or short pins 2 and 3 to disable sleep mode of the
TPS65735.
JP5 : BST_EN, ON, OFF
JP5 pin 1 is GND, pin 2 is the BST_EN pin of the TPS65735 and pin 3 is VLDO of the TPS65735. Short
pins 1 and 2 to disable the boost converter or short pins 2 and 3 to enable the boost converter.
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.
With JP3 shorting jumper connected between CHG_EN and OFF, JP4 shorting jumper connected
between SLEEP and OFF and JP5 shorting jumper connected between BST_EN and OFF 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.
Position JP5 shorting jumper between BST_EN and ON. 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.
6
TPS65735 System Evaluation Board
SLVU418
–
June 2011
Copyright
©
2011, Texas Instruments Incorporated