PAD121 Thaler Corporation, PAD121 Datasheet

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PAD121

Manufacturer Part Number
PAD121
Description
Current Limit Accessory Module
Manufacturer
Thaler Corporation
Datasheet
CURRENT LIMIT ACCESSORY MODULE
Innovation by
Thaler Corp 2015 N Forbes Blvd Tucson AZ 85745 USA Phone (800)827-6006 or (520)882-4000 Fax (520)770-9222 Web Site:
The PAD121 current limit accessory module was
designed to extend the protection circuitry for high
power amplifiers and avoid current limit induced
oscillations that often occur in high output current
amplifiers. To keep power dissipation in the
current sense resistor to a minimum the PAD121
operates with a precision 150mV floating sense
input and converts the floating sense inputs to
ground referenced 5V logic signals. Traditional
current limit circuitry does not guarantee that the
amplifier will survive over-current conditions. The
PAD121 can operate in several modes. It can latch
off the host amplifier when an over-current
condition exists immediately or after an externally
set time delay set by a simple RC circuit. The
circuit can also auto-reset with another RC circuit
time delay. In addition the host amplifier can be
shut down or reset from system logic inputs.
LOW COST ACCESSORY
FLOATING CURRENT SENSE
MULTIPLE MODE OPERATION
WIDE SUPPLY RANGE ± 8V – ± 60V
GROUND REFERENCED OUTPUT
CONVENIENT SIP PIN-OUT
HIGH POWER AMPLIFIER ADD-ON
REPLACE LINEAR CURRENT LIMIT
AMPLIFIER PROTECTION CIRCUIT
PowerAmp Design
APPLICATIONS
KEY FEATURES
DESCRIPTION
www.Thaler.com
PAD121
Rev F

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PAD121 Summary of contents

Page 1

... Traditional current limit circuitry does not guarantee that the amplifier will survive over-current conditions. The PAD121 can operate in several modes. It can latch off the host amplifier when an over-current condition exists immediately or after an externally set time delay set by a simple RC circuit. The circuit can also auto-reset with another RC circuit time delay ...

Page 2

... CURRENT LIMIT ACCESSORY MODULE PAD121 TYPICAL CONNECTION TO PAD118 1 2 BAL SUB PAD118 VIEW FROM COMPONENT SIDE +IN -Vcc NC - Thaler Corp 2015 N Forbes Blvd Tucson AZ 85745 USA Phone (800)827-6006 or (520)882-4000 Fax (520)770-9222 Web Site: EQUIVALENT CIRCUIT ...

Page 3

... PAD121 CURRENT LIMIT ACCESSORY MODULE __________________________________________________________________________________ SUPPLY VOLTAGE, +Vs to −Vs 120V −40 to 70°C OPERATING TEMPERATURE TEMPERATURE, pin solder, 10s 200°C PARAMETER INPUTS +IL, -IL OFFSET VOLTAGE OFFSET VOLTAGE vs. temperature COMMON MODE VOLTAGE RANGE COMMON MODE REJECTION, DC OUTPUTS OUT, open collector, low ...

Page 4

... Do not Thaler Corp 2015 N Forbes Blvd Tucson AZ 85745 USA Phone (800)827-6006 or (520)882-4000 Fax (520)770-9222 Web Site: OPERATING CONSIDERATIONS confuse the SD input of the PAD121 with the SD input of the host amplifier. OPERATING MODES It is possible to operate the PAD121 in several modes without the need for any external logic circuits by using a few external passive components ...

Page 5

... Propagation delay: SD (Ch1) to OUT (Ch2) Thaler Corp 2015 N Forbes Blvd Tucson AZ 85745 USA Phone (800)827-6006 or (520)882-4000 Fax (520)770-9222 Web Site: TYPICAL PERFORMANCE GRAPHS Propagation delay: Reset (Ch1) to Out (Ch2), 10k pullup Delay: +IL (Ch1) to OUT (Ch2), RC=100µS, Pins PAD121 www.Thaler.com 5 ...

Page 6

... CURRENT LIMIT ACCESSORY MODULE 1 Thaler Corp 2015 N Forbes Blvd Tucson AZ 85745 USA Phone (800)827-6006 or (520)882-4000 Fax (520)770-9222 Web Site: DIMENSIONAL INFORMATION 12 PAD121 www.Thaler.com 6 ...

Page 7

... Thaler Corp 2015 N Forbes Blvd Tucson AZ 85745 USA Phone (800)827-6006 or (520)882-4000 Fax (520)770-9222 Web Site: STATUS OUT HOST OF HOST 2 AMPLIFIER AMPLIFIER RESET SYSTEM 1 LOGIC GND 5 MODE 2 FIGURE 3b FIGURE 3 OPERATING MODES PAD121 APPLICATION CIRCUITS STATUS OUT 2 R2 RESET 1 C2 GND 5 MODE 3 FIGURE 3c www.Thaler.com 7 ...

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