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TPS2070 Datasheet(PDF) 3 Page - Texas Instruments |
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TPS2070 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 29 page ![]() TPS2070, TPS2071 FOUR-PORT USB HUB POWER CONTROLLERS SLVS287A – SEPTEMBER 2000 – REVISED FEBRUARY 2001 3 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Terminal Functions TERMINAL I/O DESCRIPTION NAME NO. I/O DESCRIPTION NC 1 No internal connection EN1 2 I Active-low enable for OUT1 AGND 3 Analog ground NC 4 No internal connection PG 5 O Logic output, power good SP 6 I Self-power voltage input, connects to local power supply SP 7 I Self-power voltage input, connects to local power supply NC 8 No internal connection VEXT 9 I Input voltage for the external voltage regulator GATE 10 O Output gate drive for an external N-channel MOSFET 3.3V_OUT 11 O 3.3-V internal voltage regulator output BPMODE† 12 O A logic signal that indicates if the outputs source from the bus-powered supply. BPMODE (TPS2070) or BPMODE (TPS2071) can be used to signal hub controller. DP0_RST 13 O Connects to DP signal from upstream hub/host through an external 1.5-k Ω resistor EN_REG 14 I Active-high enable, enables external voltage regulator. Connect to BP or GND EN2 15 I Active-low enable for OUT2 DGND 16 Digital ground VCP 17 Charge-pump output, source for an external voltage-regulator driver. Recommend 0.1- µF capacitor to DGND. CP_P 18 Charge-pump-capacitor connection from CP_M. Recommend 0.01- µF between CP_P and CP_M. CP_M 19 Charge-pump-capacitor connection from CP_P. Recommend 0.01- µ between CP_P and CP_M. EN3 20 I Active-low enable for OUT3 EN4 21 I Active-low enable for OUT4 OC1 22 O Logic output, overcurrent response for OUT1 OC2 23 O Logic output, overcurrent response for OUT2 OC3 24 O Logic output, overcurrent response for OUT3 OC4 25 O Logic output, overcurrent response for OUT4 OUT4 26 O Power switch output for downstream ports OUT3 27 O Power switch output for downstream ports OUT2 28 O Power switch output for downstream ports OUT1 29 O Power switch output for downstream ports BP 30 I Bus power voltage input, connect to VBUS BP_DIS 31 I Active-high logic input, disables autoswitch to bus power when self power is disconnected. Connect to BP or GND PG_DLY‡ 32 Adjusts the PG time delay with a capacitor to ground. Adjust the pulsewidth to fit the application. † Pin 12 is active low for TPS2070 and active high for TPS2071. ‡ Use the following formula to calculate the capacitance needed; C = (desired pulsewidth × 3 × 10–6)/1.22 |
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