HV461
Ring Generator Controller IC
Features
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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 frequencies: 12, 16
2
/
3
, 20, 25, 33
1
/
3
, 40,
50, 60Hz
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
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.
Applications
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PBX
DLC
Key Systems
Remote Terminal
Wireless Loop Systems
Typical Application Circuit
-48V
Current Sense
Xtal
+3.3V
0V
OR
-48V
V
DD
I/O
⇔
HV461FG
Gate Drive
Out
94VAC
(rms)
-48V
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
●
Tel: 408-222-8888
●
www.supertex.com
HV461
Ordering Information
Package Option
Device
7.00x7.00mm body
1.6mm height (max)
0.50mm pitch
Pin Configuration
48-Lead LQFP
HV461
HV461FG-G
-G indicates package is RoHS compliant (‘Green’)
48
1
48-Lead LQFP (FG)
(top view)
Absolute Maximum Ratings
Parameter
V
DD
Digital inputs
Analog inputs
Storage temperature
Operating temperature
Value
+4.0V
-0.5V to +7.0V
-0.5V to +7.0V
-65°C to +150°C
-40°C to +85°C
Product Marking
Top Marking
YYWW
HV461FG
LLLLLLLLL
Bottom Marking
CCCCCCCC
AAA
YY = Year Sealed
WW = Week Sealed
L = Lot Number
C = Country of Origin*
A = Assembler ID*
= “Green” Packaging
*May be part of top marking
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.
48-Lead LQFP (FG)
Electrical Specifications
(unless otherwise specified: V
External Supply
Sym
V
DD
I
DD
Parameter
Supply voltage
Supply current
(AV
DD
+ DV
DD
)
Min
3.0
-
Typ
3.3
7
DD
= 3.3V, T
A
= -40°C to +85°C)
Max
3.6
30
Units
V
mA
Conditions
---
f
PWM
= 100kHz
f
osc
= 19.6608MHz SW outputs NC
Open loop config, External V
GD
Gate Drive Supply
Sym
V
GD
I
GD
V
DR(lo)
V
DR(hi)
t
RISE
t
FALL
f
GD
D
GD
Parameter
Boost circuit voltage
Gate drive supply current
Drive voltage, low
Drive voltage, hi
Rise time
Fall time
Converter frequency
Duty cycle
45
Min
9.0
-
-
V
DD
- 0.4
-
-
Typ
9.6
-
-
-
-
-
50
Max
10.2
5.0
10
0.2
-
100
100
55
V
mA
mA
V
V
ns
ns
%
Conditions
---
V
DD
= 2.97 - 3.63V, SW outputs unloaded
V
DD
= 2.50 - 2.93V, SW outputs unloaded
I
OUT
= -10µA
I
OUT
= 10µA
C
L
= 200pF
C
L
= 200pF
---
---
same as PWM
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
●
Tel: 408-222-8888
●
www.supertex.com
2
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