Dear Sirs,
Early, we consulted on various questions about TPS54260, BQ24032a and TPS63020DSJ chips with you. Thank you very much for your replays. I trust your opinion, thanks. We continue to apply TPS54260, BQ24032a and TPS63020DSJ chips to our Fort-111/ Fort-111M designs to line production. TPS54260, BQ24032a and TPS63020DSJ chips operates well. I have new task «Fort-112EG» design. It is system of emergency reaction (standard eCall/E112) for motor-car industry. As I understand from standard our design must contains Ni-MH recharge battery. As I understand from datasheet of BQ24032a this chip uses for Li-Ion, Li-Polymer recharge batteries. Our design contains two source of energy: Vin is 8-36 V (high voltage input) and Ni-MH recharge battery. We want to use 3/V500HT Ni-MH recharge battery from Varta. Datasheet of this battery attached to this mail (Vbat = 2.4 – 4.08 V). Vout of power supply junction can be 2.7 – 5.5 V (it is voltage for LTC3113 chip with 3A load current). Typical load current of all design is 1.0 – 2.5A continuously (pulse off), the relative current peaks can be as high as about 3.75 A (pulse on, around 1.154 mS every 4.615 mS for 3G/GSM modem), maximum load current of all design is 3.75 A (in peaks). Additionally, we must take into account charge battery current for 3/V500HT Ni-MH recharge battery. Functional scheme of our old and new designs attached to this mail. I have any question about my new task: 1) Can I use BQ24032a chip for out design with Ni-MH recharge battery (with patch)? 2) Can I have new TI reference design for my new task? I want to have analog of our old design (with TPS54260, BQ24032a and TPS63020DSJ chips) for Ni-MH recharge battery on single chip or number of chips, but our new design must contains new current distribution.
Best regards, Ruslan Chaban, Russian, Perm, Fort-Telecom Inc, rchaban@fort-telecom.ru, design engineer, 17.09.2013
