General Description

The Supertex HV450 is a PWM high voltage ring generator. The high voltage output P- and N-channel transistors are controlled independently by the logic inputs PIN and NIN. For application where a single control pin (NIN) is desired, the mode pin should be connected to Gnd. This adds a 200ns deadband on the control logic to avoid cross conduction on the high voltage output. A logic high on NIN will turn the high voltage P-Channel on and the N-Channel off. The outputs can drive up to 5 RENs. The HV450 can drive external MOSFETs for applications requiring larger loads. The IC can be powered down by connecting the enable pin to VDD. The high voltage outputs have pulse by pulse over current protection.

Features

❏ Integrated high voltage transistors

❏ 67VRMS ring signal

❏ Output over current protection

❏ Can drive external MOSFETs for larger loads

Applications

❏ High voltage ring generator

❏ Set-top/Street box ring generator

❏ Pair gain ring generator