AS1720A AMSCO [austriamicrosystems AG], AS1720A Datasheet

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AS1720A

Manufacturer Part Number
AS1720A
Description
Solenoid / Valve Dr iver wi th Cur rent Limi tat ion
Manufacturer
AMSCO [austriamicrosystems AG]
Datasheet
adjustable
Duty cycle
100nF
R1
R2
VDDHV
VDDA
DUTY
Vsupply: +5V to +50V
2
1
3
V
ref
R
PU
Off
On
VDDA
Oscillator
ENN
30kHz
Energising Current adjust
Ref Generator
8
PWM &
LDO &
Control
IE
R
6
Delay
Internal VDDA typ. 3.3V
IE
Hold Current adjust
Shutdown
Thermal
Current
IH
Adjust
7
R
IH
AS1720
5
VSS
4
OUT
L
10nF
R
L
Wheeling
Diode
Free-

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AS1720A Summary of contents

Page 1

Vsupply: +5V to +50V 1 Ref Generator VDDHV 100nF 2 VDDA 30kHz Oscillator R1 3 adjustable Duty cycle DUTY R2 V ref VDDA R PU ENN Off On Energising Current adjust Internal VDDA typ. 3.3V LDO & AS1720 Delay Thermal ...

Page 2

ENN VDDHV VDDA 2 AS1720 DUTY OUT 4 5 VSS DDA ...

Page 3

Electrical Parameters J ...

Page 4

DDHV SS AMB AMB J DDHV DDA DD OUT_E IH IL HYST PU OUT OUT_H trig PWM OUT IE DDHV OUT_E DDA SS OUT_E DDA ...

Page 5

SUPPLY IE IH AMB DUTY 0.5 0.75 1 1.25 1.5 1.75 Voltage @ pin DUTY (V) 440 430 420 410 400 390 380 370 360 ...

Page 6

IH DUTYCYCLE V DUTY Internal VDDA typ. 3.3V VDDA R1 DUTY adjustable Duty cycle R2 V ref optional VDDA fixed 50% Duty cycle DUTY DDA = 0 381 V – 0 014 DUTY 30kHz Delay Oscillator PWM & Control VDDA ...

Page 7

DDA ----------- - OUT Current mirror 1.2V reference 1.2V PWM & Control (EQ 2) OUT ...

Page 8

... I S Vsupply: +12V VDDHV 100nF VDDA AS1720A DUTY ENN IE R 120k Energising Current adjust R 100 1 ----- - -------- - = 01A = 400mA 100 - I OUT 1 + LM741 10mA Relay VSS 240k Hold Current adjust ( BC161 Free- Wheeling Diode ...

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Note: ...

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