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TPS40130DBTRG4 датащи(PDF) 9 Page - Texas Instruments |
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TPS40130DBTRG4 датащи(HTML) 9 Page - Texas Instruments |
9 / 39 page www.ti.com UDG−04030 Power-On Reset U13 5 µA 23 22 10 11 U4 PWM LOGIC 18 BP5 AGND CS1 CSRT1 FB PWM1 TPS40130DBT 7 8 9 13 VOUT GSNS DIFFO VREF 14 15 25 12 DROOP FB SS COMP 21 20 17 24 CS2 CSRT2 ILIM UVLO 16 19 6 EN/SYNC RT OVSET + + + U9 ICTLR U1 U7 U12 + U18 U11 0.7 V Ramp1 U2 PWM2 U19 OC/UV Detect + U3 + U15 PGOOD U8 VIN5 BP5 U23 Clock U22 Power−On Reset U25 OV Detect U24 Ramp Gen Ramp1 Ramp2 U20 SS UV OV OC 29 LDRV2 U21 U17 27 HDRV2 26 BOOT2 28 SW2 VIN5 1 LDRV1 2 VIN5 30 PGND U10 U5 Anti Cross Conduction 4 HDRV1 5 BOOT1 3 SW1 U6 U16 Anti Cross Conduction Ramp2 U14 20 k Ω 20 k Ω 20 k Ω 20 k Ω FUNCTIONAL DESCRIPTION TPS40130 SLUS602B – JUNE 2004 – REVISED SEPTEMBER 2005 FUNCTIONAL BLOCK DIAGRAM The TPS40130 uses programmable fixed-frequency, peak current mode control with forced phase current balancing. When compared to voltage-mode control, current mode results in a simplified feedback network and reduced input line sensitivity. Phase current is sensed by using either the DCR (direct current resistance) of the filter inductors or current sense resistors installed in series with output. The first method involves generation of a current signal with an R-C circuit (shown in the applications diagram). The R-C values are selected by matching time constants of the RC circuit and the inductor time constant, R×C = L/DCR. With either current sense method, the current signal is amplified and superimposed on the amplified voltage error signal to provide current mode PWM control. Output voltage droop can be programmed to improve the transient window and reduce size of the output filter. Other features include: a true differential output sense amplifier, programmable current limit, programmable output over-voltage set-point, capacitor set soft-start, power good indicator, programmable input undervoltage lockout (UVLO), user programmable operation frequency for design flexibility, external synchronization capability, programmable pulse-by-pulse overcurrent protection, output undervoltage shutdown and restart. 9 Submit Documentation Feedback |
Аналогичный номер детали - TPS40130DBTRG4 |
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Аналогичное описание - TPS40130DBTRG4 |
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