HV421 Datasheet, PDF (1/5 Pages) Supertex, Inc – High Voltage 1 REN Ring Generator

– ^{OBSOLETE –}
High Voltage 1 REN Ring Generator
Ordering Information
Package Options
Device
8-Lead SO
HV421
HV421LG
HV421
Features
Processed with HVCMOS^® technology
4.75V to 9.5V operating supply voltage
DC to AC conversion
1 REN load capacity
Adjustable ring frequency from 15Hz to 60Hz
Adjustable converter frequency
Enable/Disable function
General Description
The Supertex HV421 is a high voltage ring generator designed
to drive 1 North American REN (ringer equivalent number) from
a 5V source. The HV421 has an internal DC-DC converter which
converts the 5V DC supply to a nominal 68V DC connected to the
V_PP pin. The DC-DC converter frequency of the HV421 is set by
an external resistor connected between R_SW and V_DD. The
ringing signal is generated by a high voltage H-bridge which
produces two square waves which are 180 degrees from each
other. The ringing frequency of the H-bridge is set by an external
resistor connected between R_RING and V_DD.
11
Absolute Maximum Ratings*
Supply Voltage, V_DD
Output Voltage, V_cs
Operating Temperature Range
-0.5V to +10V
-0.5V to +120V
0°C to +85°C
Storage Temperature Range
-65°C to +150°C
SO-8 Power Dissipation
Note:
*All voltages are referenced to GND.
400mW
Pin Configuration
V_DD 1
ςΑ
R_SW 2
V_PP 3
L_x 4
8 R_ring
7 Gate
6 Gate
5 GND
Top View
SO-8
11-1