Document
Supertex inc.
HV461
Ring Generator Controller IC
Features
►► 3.3V operation, logic inputs 3.3V & 5.0V compatible
►► Digital control of ring frequency, amplitude, and offset
►► Control via 8-bit bus or via individual inputs
►►
8 built-in ring 50, 60Hz
frequencies:
12,
162/3,
20,
25,
331/3,
40,
►► External ring frequency input
►► Low distortion sine wave synthesizer
►► AC-only, AC+DC, or DC-only ringer output
►► Adjustable over-current protection
►► Internal precision voltage references
►► Power-on reset and undervoltage lockout for hotswap capability
►► Sync output with adjustable lead time for synchronizing ringing relays
►► Fault output for problem detection
►► Open or closed loop operation
►► Efficient 4-quadrant operation
►► Zero-cross turn-on with zero-cross turn-off option
Applications
►► PBX ►► DLC ►► Key Systems ►► Remote Terminal ►► Wireless Loop Systems
General Description
The HV461FG is a highly integrated ring generator controller IC, designed to work with a patented four-quadrant inverter topology, with synchronous rectifiers on the secondary side to achieve higher efficiencies. The inverter delivers the desired ring voltage from a standard -48V Telecom power supply.
The HV461 consists of a sine wave synthesizer that can provide eight different ring frequencies for universal applications. Any other frequency in the 12 to 63Hz range can be obtained by applying an external logic signal to the IC. A transparent latch permits control of the ringer output individually or through the 8-bit bus. The output amplitude and DC offset can be digitally controlled providing high flexibility to the designers. The patented inverter topology using the HV461 controller IC is capable of achieving higher efficiencies, typically over 80%, and drive up to a 40 REN load.
The controller allows ring generators to provide a floating 94VAC (rms) waveform that can be referenced to either the -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 output stage on a DC source, or both.
The HV461 also has an internal boost converter that can be used to provide the gate drive voltages for the two MOSFETS on the primary side and the two secondary rectifiers on the secondary side.
Typical Application Circuit
+3.3V I/O
-48V
Current Sense Xtal VDD Gate Drive
Out
HV461
-48V
0V -48V
OR
94VAC(rms)
Doc.# DSFP - HV461 C071913
Supertex inc. www.supertex.com
Ordering Information
Part Number
Package Option
HV461FG-G
48-Lead LQFP
HV461FG-G M931 48-Lead LQFP
-G denotes a lead (Pb)-free / RoHS compliant package
Packing 250/Tray 1000/Reel
Pin Configuration
48 1
HV461
Absolute Maximum Ratings
Parameter
Value
VDD Digital inputs
+4.0V -0.5V to +7.0V
48-Lead LQFP (top view)
Analog inputs
-0.5V to +7.0V
Storage temperature
-65°C to +150°C
Operating temperature
-40°C to +85°C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Continuous operation of the device at the absolute rating level may affect device reliability. All voltages are referenced to device ground.
Typical Thermal Resistance
Package 48-Lead LQFP
θja 52OC/W
Product Marking
Top Marking
YYWW YY = Year Sealed
HV461FG WW = Week Sealed
LLLLLLLLL
L = Lot Number
Bottom Marking C = Country of Origin* A = Assembler ID*
CCCCCCCC AAA
= “Green” Packaging
*May be part of top marking
Package may or may not include the following marks: Si or
48-Lead LQFP
Electrical Specifications (unless otherwise specified: VDD = 3.3V, TA = -40°C to +85°C)
External Supply
Sym Parameter
Min Typ Max Units Conditions
VDD Supply voltage
IDD
Supply current (AVDD + DVDD)
3.0 3.3 3.6 V --fPWM = 100kHz
- 7 30 mA fosc = 19.6608MHz SW outputs NC Open loop config, External VGD
Gate Drive Supply
Sym Parameter VGD Boost circuit voltage
IGD Gate drive supply current
VDR(lo) VDR(hi) tRISE tFALL
fGD DGD
Drive voltage, low Drive voltage, hi Rise time Fall time Converter frequency Duty cycle
Min Typ Max
9.0 9.6 10.2
-
-
5.0 10
- - 0.2
VDD - 0.4 -
-
100
- - 100
same as PWM
45 50 55
Units V mA mA V V ns ns
%
Conditions ---
VDD = 2.97 - 3.63V, SW outputs unloaded VDD = 2.50 - 2.93V, SW outputs unloaded IOUT = -10µA IOUT = 10µA CL = 200pF CL = 200pF ---
---
Doc.# DSFP - HV461 C071913
Supertex inc.
2 www.supertex.com
Voltage Reference
Sym Parameter
VREF1 TCREF1 ∆Vref1 VREF2 TCREF2 ∆Vref2
Reference voltage 1 Temperature coefficient Output regulation Reference voltage 2 Temperature coefficient Output regulation
Logic Inputs
Sym Parameter
VIN(lo) VIN(hi) IIN(lo) IIN(hi) CIN
tS tH
Input voltage low Input voltage high Input current low Input current high Input capacitance Set-up time Hold time
Reset
Sym
Parameter
VRESET(ON) VRESET(OFF) VRESET (HYS)
IP-UP
RESET on voltage RESET off voltage RESET hysteresis RESET.