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TPS40090PWG4 Datasheet(PDF) 9 Page - Texas Instruments |
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TPS40090PWG4 Datasheet(HTML) 9 Page - Texas Instruments |
9 / 31 page t BPS + 4.5 C BP5 8 10*3 1.0 0.7 EN BP5 SS VOUT PGOOD t -Time BP5 BP5 BP5 1 2 3 4 4-Phase Operation 1 2 3 4 3-Phase Operation 2-Phase Operation 1 2 3 4 TPS40090 TPS40091 www.ti.com SLUS578B – OCTOBER 2003 – REVISED MAY 2006 SETTING CONTROLLER CONFIGURATION By default, the controller operates at four-phase configuration. The alternate number of active phases is programmed by connecting unused PWM outputs to BP5. (See Figure 1) For example, for three-phase operation, the unused fourth phase output, PWM4, should be connected to BP5. For two-phase operation, the second, PWM2, and the fourth, PWM4, outputs should be connected to BP5. POWER UP Capacitors connected to the BP5 pin and the soft-start pin set the power-up time. When EN is high, the capacitor connected to the BP5 pin gets charged by the internal LDO as shown in Figure 2. (1) Figure 1. Programming Controller Configuration Figure 2. Power-Up Waveforms Copyright © 2003–2006, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Link(s): TPS40090 TPS40091 |
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