HV9901 Supertex, Inc., HV9901 Datasheet

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HV9901

Manufacturer Part Number
HV9901
Description
Universal Relay Driver
Manufacturer
Supertex, Inc.
Datasheet
Features
Applications
Typical Boost Application Circuit
10 to 450V input voltage range
Energy saving hold current mode
Adjustable microcontroller supply
Low supply current <1.0mA
Constant current coil
Programmable pull-in current, pull-in time,
Effi cient PWM operation using the relay
Industrial controls
Relay timers
Solenoid drivers
Home automation
and hold current
coils’ inductance
Universal Relay Driver
General Description
The Supertex HV9901 is a BiCMOS/DMOS universal relay driver that
employs PWM switching techniques. It is designed for effi cient and energy-
saving operation of a low voltage relay with supply voltages ranging from
10 to 450V DC through utilization of the relay coils’ inductance.
The circuit is capable of operating over a wide input voltage range without
requiring a change of any external components. For example, this will
enable users to use 5.0V coil relays for DC voltages 10 to 450V or AC
voltages up to 240V.
The HV9901 has an internal high-voltage regulator to power internal
PWM circuitry. Additionally, it includes an adjustable auxiliary regulator
with a 1.0mA capability that can be used to supply low power micro
controllers.
The pull-in current, pull-in time and hold current are all program-mable
using only two resistors and a capacitor. The PWM switching frequency
can be either:
The enable (ENI) logic input is used to turn the relay on/off. Enable
polarity may be selected via the POL input. Audible noise is prevented
using fi xed switching frequencies above 20kHz.
WARNING!!! Galvanic isolation is not provided. Dangerous voltages are
present when connected to the AC line. It is the responsibility of the
designer to ensure adequate safeguards are in place to protect the end
user from electrical shock.
- Synchronized to an external clock, or
- Synchronized to other HV9901s, where the synchronized
frequency is the highest free-running frequency.
HV9901

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HV9901 Summary of contents

Page 1

... Typical Boost Application Circuit Universal Relay Driver General Description The Supertex HV9901 is a BiCMOS/DMOS universal relay driver that employs PWM switching techniques designed for effi cient and energy- saving operation of a low voltage relay with supply voltages ranging from 10 to 450V DC through utilization of the relay coils’ inductance. ...

Page 2

... SOIC (NG) Max Units Conditions 450 1.0mA load CC No load at V load 500pF load 500pF 25KHz OSC 8.5 V --- - V --- 5 1.0mA load CC 1 load -1.0V V --- DD 100 REF HV9901 . DD = 1.0mA = 25KHz OSC . ...

Page 3

... 0.775 0.833 - 200 - 200 HV9901 Max Units Conditions 1. -40°C to +85°C A 7.0 mV 0mA < I < 0.3mA REF 15 mV 8.5V < V < 9.5V DD 1.0 mA --- 20 μA --- 35 kHz R = 1.0MΩ T 140 kHz R = 226KΩ ppm - +85 A ...

Page 4

... FBa V 1.25V ⎜ 1 ⎟ CC ⎝ ⎠ R FBb FBb t PULL-IN I PULL-IN Time Figure 1 4 Max Units Conditions 100 0. 5.0 μA - μ 2.0V < V < 5.0 μA - μ 0. ⎞ − ⎟ − V ⎠ > 23kHz) I HOLD HV9901 ...

Page 5

... Gate driver output for driving the external switching MOSFET Current sense input. 6 COM Common. Connect to circuit ground. Open-drain input/output for synchronizing the internal PWM oscillator to other HV9901s SYNC external clock resistor from this pin to ground sets the PWM switching frequency. ...

Page 6

... All comparators have open drain outputs. UVLO Low Limit High Limit C VDD VDD Oscillator shut down 40µA High Duty Cycle Oscillator 6 HV9901 VDD 16 4.7µF VREF 1.25 V Bandgap 15 Reference 100nF 14 HOLD/DELAY CHD FBb VDD R FBa 100nF 1.25V 12 VCC 5 V µ ...

Page 7

... This dimension is not specifi the original JEDEC drawing. The value listed is for reference only. Drawings are not to scale. (The package drawing(s) in this data sheet may not refl ect the most current specifi cations. For the latest package outline information go to http://www.supertex.com/packaging.html.) Doc.# DSFP-HV9901 A022708 D E1 ...

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