Controller

UC1845AAY Datasheet PDF – Current Mode PWM Controller

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Part Number: UC1845AAY

Function: Current Mode PWM Controller

Package: DIP 8 Pin, DIP 14 Pin

Manufacturer: Linfinity Microelectronics

Image and Pinouts:
UC1845AAY datasheet

Description

The UC1845AAY family of control ICs provides all the necessary features to implement off-line fixed-frequency, current-mode switching power supplies with a minimum of external components. The current mode architecture demonstrates improved load regulation, pulse-by-pulse current limiting and inherent protection of the power supply output switch.

Features

1. OPTIMIZED FOR OFF-LINE AND DC-TO-DC CONVERTERS.

2. AUTOMATIC FEED FORWARD COMPENSATION.

3. PULSE-BY-PULSE CURRENT LIMITING.

4. ENHANCED LOAD RESPONSE CHARACTERISTICS.

5. UNDER-VOLTAGE LOCKOUT WITH HYSTERESIS.

Absolute maximum ratings :

components

Applications:

1. ECONOMICAL OFF-LINE FLYBACK OR FORWARD CONVERTERS.

2. DC-DC BUCK OR BOOST CONVERTERS.

3. LOW COST DC MOTOR CONTROL.

 

Other data sheets are available within the file:

UC1842AAD, UC1842AAM, UC1842AAY, UC1842ADM, UC1843AAD

UC1845AAY Datasheet PDF Download

UC1845AAY pdf

JT3027 Datasheet PDF – PWM Switching Controller – JINTEK

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Part Number: JT3027

Function: High performance current – mode PWM power supply power pack

Package: SOP-8, DIP-8 Pin Type

Manufacturer: JINTEK, Suns

Image

jt3027-pwm-controller

Description

The JT3027 is High integration degree, high – performance current – mode PWM decoupler core piece. Applicable power supply, modulator, etc. Small and medium size power supply power supply equipment.

In order to reduce the standby power consumption, meet the higher green environmental standards, the chip provides a burst mode (BurstMode) function. That is, under light load or no load, JT3027 can linearly reduce the switching frequency of the chip, thus reducing the switching loss, get lower standby power consumption, improve the power system conversion efficiency.

 

Pinout

jt3027-datasheet-pinout

 

Features

1. Burst Mode function;
2. Low cadence current (7uA) (1.6mA);
3. Inside the room before extinguishing;
4. Inside the building;
5. Electric current modeling work;
6. External adjustable PWM operation frequency ratio;
7. Sequential current limit protection (OCP);
8. Internal construction system VDD fitting protection;
9. Low voltage function (UVLO);
10. Power consumption (18.5V);
11. Constant export performance limit;
12. Overprotection (OLP);

 

JT3027 Datasheet PDF


 

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