st1845rkg STMicroelectronics, st1845rkg Datasheet

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st1845rkg

Manufacturer Part Number

st1845rkg

Description

Rad-tolerant Current Mode Pwm Controller

Manufacturer

STMicroelectronics

Datasheet

1.ST1845RKG.pdf (25 pages)

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Download datasheet (512Kb)

Features

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Description

The ST1843HR and ST1845HR ICs are rad-

tolerant current mode PWM controllers providing

an industry standard solution for the

implementation of provides the off-line or DC to

DC fixed frequency current mode control

schemes with a minimal external parts count.

Its radiation hardness and hermetic packaging

makes it an ideal choice for aerospace and other

harsh environments.

Table 1.

September 2011

Order codes Duty cycle max Radiation level

ST1845RKG

ST1843FKG

ST1843K1

ST1845K1

Oscillator frequency guaranteed at 250 kHz

Trimmed oscillator for precise frequency

control

Current mode operation to 500 kHz automatic

feed forward compensation

Latching PWM for cycle-by-cycle current

limiting

Internally trimmed reference with undervoltage

lockout

High current totem pole output

Undervoltage lockout with hysteresis

Low start-up and operating current

Hermetic package

50 and 100 krad (Si)

SEL free @ 120 MeV/cm2/mg at 125°C

Device summary

100%

100%

50%

50%

100 krad (Si)

100 krad (Si)

50 krad (Si)

50 krad (Si)

Rad-tolerant current mode PWM controller

Doc ID 019049 Rev 1

According to ESCC Target

According to ESCC Target

Engineering Model

Engineering Model

Quality level

EPPL Package Lead finish Mass (g)

-

-

Flat-8

Flat-8

Flat-8

Flat-8

Flat-8

Gold

Gold

Gold

Gold

ST1843

ST1845

www.st.com

0.45

0.45

0.45

0.45

1/25

25

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