zxct1032 Zetex Semiconductors plc., zxct1032 Datasheet
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zxct1032
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zxct1032 Summary of contents
Page 1
... Linear soft-start • Over-current detector • Over-current disconnect/fuse Linear soft-start Upon power up the ZXCT1032 enters a linear soft-start mode. During which the output current ramps up from zero to a maximum user defined trip point. The trip point is set by the voltage on I pin and R ...
Page 2
... IN- The load referred input to the current monitor control loop. 7 N/C Not connected 8 IN+ Acts as both the supply pin to the ZXCT1032 and the supply referred sense input to the current monitor control loop. Issue 4 - June 2007 © Zetex Semiconductors plc 2007 6 IN- 5 Drive ...
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... ISET SENSE = 2.1V, V > 205mV ISET SENSE I = 100µA FLAG V = 2.1V, V < 185mV, ISET SENSE FLAG ISET (†) See footnote FLAG = Open FLAG = Low 3 ZXCT1032 +0 ................ 500 mV Min. Max. Units 9 IN+ 1 2.5 Min. Typ. Max. Units 1.6 2.5 95 185 195 205 2.0 2 ...
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... V =9.5V IN+ V =20V 35 IN+ V =21V IN ZXCT1032 Quiescent current vs input voltage Input voltage V vs input voltage ISET Input voltage ( input voltage 25° Input voltage (V) www ...
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... Issue 4 - June 2007 © Zetex Semiconductors plc 2007 -206 9.5 to 21V IN+ -207 -207.5 -208 3.75 3.74 3.73 3.72 3.71 3. ZXCT1032 I vs input voltage CT-CHG T = 25° Input voltage ( input voltage CT-DIS T =25° Input voltage (V) www ...
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... Application information ZXCT1032 block diagram and description R SENSE (8) IN+ I CT-CHG 200 A (3) I SET ( DIS - 3 GND (1) Operation of the ZXCT1032 1 After power-up, the timing capacitor (C the output amplifier's drive pin to fall in voltage, progressively turning on the PMOS transistor. The load current is monitored by the current monitor and the amplifier control loop controls the load current allowing it to increase gradually (soft-start mode) as the voltage on C increases ...
Page 7
... The ZXCT1032 has now entered its over-current detector mode effectively “transparent” to the load until the current monitor output exceeds the trip point. 3 Fuse operation is provided by the trip comparator whose threshold voltage is set by V (internally nominally 2.1V, although this threshold can easily be overdriven). As the load current increases, so does the monitor voltage ...
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... The current monitor has an intentional output offset of +150mV the trip comparator will be permanently high and the output will be completely disabled. Issue 4 - June 2007 © Zetex Semiconductors plc 2007 is held at 0V, the output ISET 8 ZXCT1032 www.zetex.com ...
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... Note: Controlling dimensions are in inches. Approximate dimensions are provided in millimeters Issue 4 - June 2007 © Zetex Semiconductors plc 2007 Millimeters DIM Min. Max. 1.35 1.75 e 0.10 0.25 b 4.80 5.00 c 5.80 6.20 3.80 4.00 h 0.40 1. ZXCT1032 Inches Millimeters Min. Max. Min. 0.050 BSC 1.27 BSC 0.013 0.020 0.33 0.008 0.010 0.19 0° 8° 0° 0.010 0.020 0. www.zetex.com Max. ...
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... Zetex Semiconductors plc 3701-04 Metroplaza Tower 1 Zetex Technology Park, Chadderton Hing Fong Road, Kwai Fong Oldham, OL9 9LL Hong Kong United Kingdom Telephone: (852) 26100 611 Telephone: (44) 161 622 4444 Fax: (852) 24250 494 Fax: (44) 161 622 4446 asia.sales@zetex.com hq@zetex.com 10 ZXCT1032 www.zetex.com ...