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SM72295MA 数据表(PDF) 2 Page - Texas Instruments |
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SM72295MA 数据表(HTML) 2 Page - Texas Instruments |
2 / 17 page SM72295 IOUT OVP PGOOD SOA SIB OVS HSB HBB LIA HIA LOB AGND LIB HIB BOUT SOB BIN SIA HOB VCCB VDD HSA PGND HOA HBA VCCA LOA IIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 15 16 SM72295 SNVS688E – OCTOBER 2010 – REVISED APRIL 2013 www.ti.com Connection Diagram Figure 1. Top View SOIC-28 PIN DESCRIPTIONS Pin Name Description Application Information 1 SIA Sense high input for input current Tie to positive side of the current sense resistor through an external gain sense transconductance amplifier programming resistor (RI). Amplifier transconductance is 1/RI. 2 S0A Sense low input for input current Tie to negative side of the current sense resistor through an external gain sense transconductance amplifier programming resistor. Amplifier transconductance is 1/RI. 3 IIN Output for current sense Output of the input current sense amplifier. Requires an external resistor to transconductance amplifier ground (RL). Gain is RL/RI, where RI is the external resistor in series with the SIA pin. 4 BIN Buffered IIN Buffered IIN. 5 AGND Analog ground Ground return for the analog circuitry. Tie to the ground plane under the IC 6, 9 LIA, LIB Low side driver control input The inputs have TTL type thresholds. Unused inputs should be tied to ground and not left open. 7, 8 HIA, HIB High side driver control input The inputs have TTL type thresholds. Unused inputs should be tied to ground and not left open. 10 PGOOD Power good indicator output Open drain output with an internal pull-up resistor to VDD indicating VCC is in regulation. PGOOD low implies VCC is out of regulation. 11 BOUT Buffered IOUT Buffered IOUT. 12 IOUT Output for current sense Output of the output current sense amplifier. Requires an external resistor to comparator. ground (RL). Gain is RL/RI, where RI is the external resistor in series with the SIB pin. 13 S0B Sense low input for output current Tie to negative side of the current sense resistor through an external gain sense amplifier programming resistor. Amplifier transconductance is 1/RI. 14 SIB Sense high input for output current Tie to positive side of the current sense resistor through an external gain sense amplifier programming resistor (RI). Amplifier transconductance is 1/RI. 15 OVP Over voltage indicator output Open drain output with an internal pull-up resistor to VDD indicating OVS >VDD. OVP is low when OVS>VDD. 16 OVS Sense input for over voltage Requires an external resistor divider. VDD is the reference voltage. 17 VDD 3.3V or 5V regulator output Bypass with 0.1uF. Reference for over voltage shutdown and IOUT/IIN clamp 18, 28 HSA, High side MOSFET source Connect to bootstrap capacitor negative terminal and the source of the high side HSB connection MOSFET. 2 Submit Documentation Feedback Copyright © 2010–2013, Texas Instruments Incorporated Product Folder Links: SM72295 |
类似零件编号 - SM72295MA |
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类似说明 - SM72295MA |
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