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HV430 Datasheet(PDF) 1 Page - Supertex, Inc |
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HV430 Datasheet(HTML) 1 Page - Supertex, Inc |
1 / 9 page Supertex inc. HV430 Supertex inc. www.supertex.com Doc.# DSFP-HV430 A031414 Features ► 105Vrms ring signal ► Output overcurrent protection ► 5.0V CMOS logic control ► Logic enable/disable to save power ► Adjustable deadband in single-control mode ► Power-on reset ► Fault output for problem detection Applications ► Line access cards ► Set-top/Street box General Description The Supertex HV430 is a high voltage PWM ring generator integrated circuit. The high voltage outputs, V PGATE and V NGATE, are used to drive the gates of external high voltage N-channel and P-channel MOSFETs in a push-pull configuration. Overcurrent protection is implemented for both the P-channel and N-channel MOSFETs. External sense resistors set the over-current trip point. High-Voltage Ring Generator The RESET input functions as a power-on reset when connected to an external capacitor. The FAULT output indicates an overcurrent condition and is cleared after 4 consecutive cycles with no overcurrent condition. A logic low on RESET or ENABLE clears the FAULT output. It is active- low and open-drain to allow wire OR’ing of multiple drivers. P GATE and NGATE are controlled independently by logic inputs P IN and NIN when the MODE pin is at logic high. A logic high on P IN will turn on the external P-channel MOSFET. Similarly, a logic high on N IN will turn on the external N-channel MOSFET. Lockout circuitry prevents the N and P switches from turning on simultaneously. A pulse width limiter restricts pulse widths to no less than 100 - 200ns. For applications where a single control input is desired, the MODE pin should be connected to SGND. The PWM control signal is then input to the N IN pin. A user-adjustable deadband in the control logic ensures break-before-make on the outputs, thus avoiding cross conduction on the high voltage output during switching. A logic high on N IN will turn the external P- Channel MOSFET on and the N-Channel off, and vice versa. The IC can be powered down by applying a logic low on the ENABLE pin, placing both external MOSFETs in the off state. Functional Block Diagram Ringer Output R SENSE R SENSE V DD Down Translator N Driver FAULT PIN NIN RESET De-glitcher DEADBAND ENABLE MODE V DD Control Logic V NN1 V PP1 SIG GND V DD Current Trip PWR GND +5.0V VPP1 VPP2 VPSEN VPGATE VNN1 VNN2 VNSEN VNGATE 10µA reset clk V NN2 Regulator Up Translator P Driver Up Translator Down Translator Current Trip V PP2 Regulator |
Similar Part No. - HV430_14 |
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Similar Description - HV430_14 |
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