|
Details, datasheet, quote on part number:HV421
| |
Datasheet text preview:
Ordering Information
Device HV421 8-Lead SO HV421LG
LETE OBSO
HV421
High Voltage 1 REN Ring Generator
Package Options
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 VPP pin. The DC-DC converter frequency of the HV421 is set by an external resistor connected between RSW and VDD. 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 RRING and VDD.
11
Absolute Maximum Ratings*
Supply Voltage, VDD Output Voltage, Vcs Operating Temperature Range Storage Temperature Range SO-8 Power Dissipation
Note: *All voltages are referenced to GND.
Pin Configuration
-0.5V to +10V -0.5V to +120V 0°C to +85°C -65°C to +150°C 400mW V DD R SW V PP Lx
1 2 3 4
8 7 6 5
R ring Gate Gate GND
Top View
SO-8
11-1
HV421
Electrical Characteristics
DC Characteristics
Symbol RDS(ON) I DDQ ID D I IN VPP F RING DRING fsw Dsw (VDD=5.0V, RRING=30M, RSW=1.3M, LX=330µH, TA=25°C) Parameter On-resistance of switching transistor Quiescent VDD supply current Input current going into the VDD pin Input current including inductor current Output voltage on VPP Ring frequency Ringing frequency duty cycle Switching transistor frequency Switching transistor duty cycle 65 20 170 68 25 50 35 88 30 Min Typ 3.5 Max 5 50 300 220 Units nA µA mA V Hz % KHz % VIN=5.0V. See Figure 1. I=100mA RSW = L o w VIN=5.0V. See Figure 1. VIN=5.0V. See Figure 1. VIN=5.0V. See Figure 1. VIN=5.0V. See Figure 1. Conditions
Recommended Operating Conditions
Symbol V DD TA Supply voltage Operating temperature Parameter Min 4.75 0 Typ Max 9.5 85 Units V °C Conditions
LETE Enable/Disable Table OBSO
Symbol EN-L EN-H Parameter Min 0 V DD - 0 . 5 Typ Max 0.5 V DD Units V V Logic input low voltage Logic input high voltage
Conditions
11-2
HV421
Block Diagram
LETE OBSO
Lx VPP DC-DC Converter Gate
VDD
RSW
RRING GND
Ring Frequency
Level Translator
Gate
Typical Application
ON = 4.75V OFF = 0V
30M
0.01µF
Q1
D1
11
6.8K
1
330µH
VDD RSW VPP Lx
RRING Gate Gate GND HV421LG
8 7
D2
1.3M
2 3
Q2 2.2K Q3
D3
VIN
4.75V 160mA
6
1N4148
4 5
2.2K
8.0µF Load
D4
1.0µF
0.01µF
Q4
Q1, Q3 = Supertex VN2110K1 Q2, Q4 = Supertex VP2110K1 D1D4 = 5.1V Zener diode VOUT = ±60V Freq = 25Hz
Figure 1: 1 REN Ring Generator
11-3
|
|
