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TPS62007DGS Datasheet(PDF) 9 Page - Texas Instruments |
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TPS62007DGS Datasheet(HTML) 9 Page - Texas Instruments |
9 / 31 page PFM/PWM Control Logic Current Limit Logic _ + Compensation Soft Start Slope Compensation PFM/PWM Mode Select PFM/PWM Comparator Error Amplifier _ + Current Sense Driver Shoot-Through Logic _ + Undervoltage Lockout Bias Supply 10 Ω _ + Vref = 0.45 V R2 R1 R1 + R2 ≈ 1 MΩ Power Good Sync + Oscillator _ + Load Comparator Current Sense + Offset Antiringing FB N-Channel Power MOSFET P-Channel Power MOSFET L PGND EN FB PG FC (See Note B) VIN GND SYNC ILIM EN (See Note A) TPS62000, TPS62001, TPS62002, TPS62003 TPS62004, TPS62005, TPS62006, TPS62007, TPS62008 www.ti.com SLVS294F – SEPTEMBER 2000 – REVISED AUGUST 2015 8.2 Functional Block Diagram A. The adjustable output voltage version does not use the internal feedback resistor divider. The FB pin is directly connected to the error amplifier. B. Do not connect the FC pin to an external power source 8.3 Feature Description 8.3.1 Low Noise Antiringing Switch An antiringing switch is implemented in order to reduce the EMI radiated from the converter during discontinuous conduction mode (DCM). In DCM, the inductor current ramps to zero before the end of each switching period. The internal load comparator turns off the low side switch at that instant thus preventing the current flowing backward through the inductance which increases the efficiency. An antiringing switch across the inductor prevents parasitic oscillation caused by the residual energy stored in the inductance (see Figure 11). NOTE The antiringing switch is only activated in the fixed output voltage versions. It is not enabled for the adjustable output voltage version TPS62000. 8.3.2 Enable Logic low on EN forces the TPS6200x into shutdown. In shutdown, the power switch, drivers, voltage reference, oscillator, and all other functions are turned off. The supply current is reduced to less than 1 μA in the shutdown mode. Copyright © 2000–2015, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: TPS62000 TPS62001 TPS62002 TPS62003 TPS62004 TPS62005 TPS62006 TPS62007 TPS62008 |
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