TPS-61032 PIN DISCRIPTION

Gaurav Kothari

Other Parts Discussed in Thread: TPS61032, TPS61230, TPS3803, TLC0820A

Respected Sir,

This is Gaurav Kothari From UK Electro Mech Systems, Mumbai, India.

We are in manufacturing of Electronic Lockers. We are basically using a microcontroller with voltage range of 4.5 to 5.5 volt. but the supply voltage we have is from LI-Polymer battery which come in range of 3.0V to 4.2V. So i such case we are planning to use TPS-61032 - 5V Step up Booster IC.

We need your guidelines to clear out some confusion we are facing in designing the circuit.

The IC we are using is TPS-61032 16 pin PWP package.

There are 3 PGND pins (Pin 3,4,5) and a different GND pin (PIN 11). What the difference between this PGND pins and GND pins. can i connect this both pins together with also thermal pad.

and also please let me know how can i program the LBI pin as if i need to alarm the signal when the battery voltage reaches 3.0V. what value resistor should be placed at pin LBI to make LBO pin Low.

can i place a LED at LBO pin using a transistor for low battery indication.

over 7 years ago

0 Gaurav Kothari over 7 years ago

Intellectual 330 points

Can you please also let me know that if i am using TPS-61032 5V IC, should i keep the FB pin Floating, or it should be connected to Vout PIN.

0 Rick Duncan over 7 years ago in reply to Gaurav Kothari

TI__Guru** 114905 points

Hi Gaurav,

Your post is being moved to the Non-isolated DC/DC forum for better support.

0 JohnTucker over 7 years ago in reply to Rick Duncan

TI__Guru**** 191445 points

The datasheet contains all the information you are looking for. You could consider reading it thoroughly.

The GND pin, PGND pins and thermal pad can all be connected together. See the layout example on page 18.

Section 11.2.2.2 on page thirteen explains how to set up LBI and LBO.

The fixed output design examples in figures 19, 20 and 21 clearly show the FB pin is open. The output is sensed at VOUT.

0 Gaurav Kothari over 7 years ago in reply to JohnTucker

Intellectual 330 points

i have calculated according the data'sand formulas given in the data sheet.
what is get is 390Kohms and 2Mohms Resistor. can you please check and let us know if the values are appropriate for Battery voltage of 3V.
Input voltage range is from 2.7V to 4.2V.

0 Jasper Li over 7 years ago in reply to Gaurav Kothari

TI__Mastermind 46905 points

The TPS61032 may meet the requirement, but i guess it is not a good solution because it is very old device. please let me know the output current and if you have other special requirement? i can help to check if there is better solution.

0 Gaurav Kothari over 7 years ago in reply to Jasper Li

Intellectual 330 points

Thanks for the reply.

My requirement is to have 2 outputs with different voltages and different currents, from single input source from Li-Polymer Battery with voltage range of 3V to 4.2V and the battery has the capacity of maximum output current upto 5 Amps.

Output 1 = Fixed 4V - 2 Amps.

Output 2 = Fixed 5V - 1 Amps.

I have chosen TPS-61032 for fixed 5V output and TPS-61230 for Fixed 4V Output.

But again i have chosen TPS-61032 because it has a On Chip Battery Indicator, to which i can connect any LED to indicate the a Low Battery Error.

As well as i need The chip Enable pin with the help of which i can OFF the chip and avoid the battery drainage when system is not in use. With the Help of this Enable Pin i can ON and OFF my system.

0 Jasper Li over 7 years ago in reply to Gaurav Kothari

TI__Mastermind 46905 points

if you need to indicate the low battery condition, the TPS61032 is the only device integrating this function.

0 Gaurav Kothari over 7 years ago in reply to Jasper Li

Intellectual 330 points

If you have any IC's other than TPS61032, in which both my requirements are fulfilled (STEP-UP and BATTERY INDICATOR), even though they are two different IC's.
for eg... I can use TPS61230 for STEP UP and can you recommend me any different IC's which are specially developed to check the status of battery and indicate an error at user set voltage using a LED.

0 Jasper Li over 7 years ago in reply to Gaurav Kothari

TI__Mastermind 46905 points

there is supervisor IC, such as TPS3803, that may can be used for the battery indicator function. but another IC could increase cost.
why not use the MCU to ADC the battery voltage and indicate the error.

0 Gaurav Kothari over 7 years ago in reply to Jasper Li

Intellectual 330 points

Thanks a lot.

As also inidcated in the datasheet of TPS61230, capacitor C2x3=22uF.

can i use one single 100uF capacitor instead of using 3 x 22uF capacitor.

0 Jasper Li over 7 years ago in reply to Gaurav Kothari

TI__Mastermind 46905 points

yes, a large 100uF capacitor can be used . but a small capacitor, such as 1uF/0402, should be also used, and placed closed to the IC in PCB.

0 Gaurav Kothari over 7 years ago in reply to Jasper Li

Intellectual 330 points

so i can use 100uF 10V 1206 ceramic multilayer capacitor and in the case of 1uf capacitor can i use 1206 ceramic multilayer instead of 0402. because the package i am using for other components to design the PCB is 1206.

0 Jasper Li over 7 years ago in reply to Gaurav Kothari

TI__Mastermind 46905 points

I suggest using a small package ( 0603 or 0402) 1uF capacitor, because the parasitic inductance of the capacitor mainly depend on the package. a 1uF/1206 capacitor is useless.

0 Gaurav Kothari over 7 years ago in reply to Jasper Li

Intellectual 330 points

Thanks a lot
got your point. and also as you told me to use ADC for battery indication. as i am very new to use this type of IC's
can you please recommened me any ADC IC and also how should i connect to the MCU and what code to write.

0 Gaurav Kothari over 7 years ago in reply to Gaurav Kothari

Intellectual 330 points

can i use TLC0820A IC to check the status of battery and display it on the LCD.

0 Gaurav Kothari over 7 years ago in reply to Gaurav Kothari

Intellectual 330 points

or can you recommened me any other IC where i can use the same for ADC and display it on the LCD.

0 Jasper Li over 7 years ago in reply to Gaurav Kothari

TI__Mastermind 46905 points

i was think using the ADC pin of the MCU, such as MSP430, to detect the voltage of the battery, not an additional IC

Power management

Power management forum

TPS-61032 PIN DISCRIPTION