UC1845A-EP

Name: UC1845A-EP
Brand: TI
SKU: UC1845A-EP
Price: 4.516 USD

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Controlador PWM con modo de corriente de producto mejorado

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Hoja de datos

document-pdfAcrobat Current-Mode PWM Controller. datasheet (Rev. D) (Inglés)

UC1845A-EP

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Detalles del producto

Rating

HiRel Enhanced Product

Topology

Boost, Flyback, Forward

Vin (max) (V)

25

Control mode

Current

Features

Error amplifier, Fixed frequency, Multi-topology

Operating temperature range (°C)

-55 to 125

Duty cycle (max) (%)

50

Rating

HiRel Enhanced Product

Topology

Boost, Flyback, Forward

Vin (max) (V)

25

Control mode

Current

Features

Error amplifier, Fixed frequency, Multi-topology

Operating temperature range (°C)

-55 to 125

Duty cycle (max) (%)

50

SOIC (D)

8

29.4 mm² 4.9 x 6

Controlled Baseline

One Assembly/Test Site, One Fabrication Site

Extended Temperature Performance of –55°C to 125°C
Enhanced Diminishing Manufacturing Sources (DMS) Support
Enhanced Product Change Notification
Qualification Pedigree⁽¹⁾
Optimized for Off-line and DC-to-DC Converters
Low Start Up Current (<0.5 mA)
Trimmed Oscillator Discharge Current
Automatic Feed Forward Compensation
Pulse-by-Pulse Current Limiting
Enhanced Load Response Characteristics
Under-Voltage Lockout With Hysteresis
Double Pulse Suppression
High Current Totem Pole Output
Internally Trimmed Bandgap Reference
500 kHz Operation
Low RO Error Amp

⁽¹⁾ Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits.

Controlled Baseline

One Assembly/Test Site, One Fabrication Site

Extended Temperature Performance of –55°C to 125°C
Enhanced Diminishing Manufacturing Sources (DMS) Support
Enhanced Product Change Notification
Qualification Pedigree⁽¹⁾
Optimized for Off-line and DC-to-DC Converters
Low Start Up Current (<0.5 mA)
Trimmed Oscillator Discharge Current
Automatic Feed Forward Compensation
Pulse-by-Pulse Current Limiting
Enhanced Load Response Characteristics
Under-Voltage Lockout With Hysteresis
Double Pulse Suppression
High Current Totem Pole Output
Internally Trimmed Bandgap Reference
500 kHz Operation
Low RO Error Amp

⁽¹⁾ Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits.

The UC1842A/3A/4A/5A family of control ICs is a pin-for-pin compatible improved version of the UC3842/3/4/5 family. Providing the necessary features to control current mode switched mode power supplies, this family has the following improved features. Start up current is guaranteed to be less than 0.5 mA. Oscillator discharge is trimmed to 8.3 mA. During under voltage lockout, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.

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