Supertex inc. HV461 Ring Generator Controller IC Features General Description 3.3V operation, logic inputs 3.3V & 5.0V compatible The HV461FG is a highly integrated ring generator controller IC, designed to work with a patented four-quadrant inverter Digital control of ring frequency, amplitude, and offset topology, with synchronous rectifiers on the secondary side to Control via 8-bit bus or via individual inputs 2 1 achieve higher efficiencies. The inverter delivers the desired 8 built-in ring frequencies: 12, 16 / , 20, 25, 33 / , 40, 3 3 ring voltage from a standard -48V Telecom power supply. 50, 60Hz External ring frequency input The HV461 consists of a sine wave synthesizer that can provide Low distortion sine wave synthesizer eight different ring frequencies for universal applications. Any AC-only, AC+DC, or DC-only ringer output other frequency in the 12 to 63Hz range can be obtained by Adjustable over-current protection applying an external logic signal to the IC. A transparent latch Internal precision voltage references permits control of the ringer output individually or through the 8-bit bus. The output amplitude and DC offset can be digitally Power-on reset and undervoltage lockout for hotswap capability controlled providing high flexibility to the designers. The Sync output with adjustable lead time for synchronizing patented inverter topology using the HV461 controller IC is ringing relays capable of achieving higher efficiencies, typically over 80%, Fault output for problem detection and drive up to a 40 REN load. Open or closed loop operation The controller allows ring generators to provide a floating Efficient 4-quadrant operation 94VAC (rms) waveform that can be referenced to either the Zero-cross turn-on with zero-cross turn-off option -48V or any other offset level by using the programmable offset pins of the IC. Output offset may be achieved by directly generating the offset within the power stage, or by floating the Applications output stage on a DC source, or both. PBX DLC The HV461 also has an internal boost converter that can be Key Systems used to provide the gate drive voltages for the two MOSFETS Remote Terminal on the primary side and the two secondary rectifiers on the Wireless Loop Systems secondary side. Typical Application Circuit -48V Current Sense 0V Xtal OR VDD +3.3V Gate Drive Out -48V I/O HV461 94VAC (rms) -48V Doc. DSFP - HV461 Supertex inc. C071913 www.supertex.comHV461 Pin Configuration Ordering Information 48 Part Number Package Option Packing 1 HV461FG-G 48-Lead LQFP 250/Tray HV461FG-G M931 48-Lead LQFP 1000/Reel -G denotes a lead (Pb)-free / RoHS compliant package Absolute Maximum Ratings Parameter Value V +4.0V DD 48-Lead LQFP Digital inputs -0.5V to +7.0V (top view) Analog inputs -0.5V to +7.0V Product Marking Storage temperature -65C to +150C Top Marking Operating temperature -40C to +85C YYWW YY = Year Sealed Absolute Maximum Ratings are those values beyond which damage to the device may occur. HV461FG WW = Week Sealed Functional operation under these conditions is not implied. Continuous operation of the device LLLLLLLLL L = Lot Number at the absolute rating level may affect device reliability. All voltages are referenced to device ground. C = Country of Origin* Bottom Marking A = Assembler ID* = Green Packaging CCCCCCCC Typical Thermal Resistance AAA *May be part of top marking Package ja Package may or may not include the following marks: Si or O 48-Lead LQFP 52 C/W 48-Lead LQFP Electrical Specifications (unless otherwise specified: V = 3.3V, T = -40C to +85C) DD A External Supply Sym Parameter Min Typ Max Units Conditions V Supply voltage 3.0 3.3 3.6 V --- DD f = 100kHz PWM Supply current I - 7 30 mA f = 19.6608MHz SW outputs NC DD osc (AV + DV ) DD DD Open loop config, External V GD Gate Drive Supply Sym Parameter Min Typ Max Units Conditions V Boost circuit voltage 9.0 9.6 10.2 V --- GD 5.0 mA V = 2.97 - 3.63V, SW outputs unloaded DD I Gate drive supply current - - GD 10 mA V = 2.50 - 2.93V, SW outputs unloaded DD V Drive voltage, low - - 0.2 V I = -10A DR(lo) OUT V Drive voltage, hi V - 0.4 - - V I = 10A DR(hi) DD OUT t Rise time - - 100 ns C = 200pF RISE L t Fall time - - 100 ns C = 200pF FALL L f Converter frequency same as PWM --- GD D Duty cycle 45 50 55 % --- GD Doc. DSFP - HV461 Supertex inc. C071913 2 www.supertex.com