Home>Components>TL3845P Current-Mode PWM Controller:Description;Features and Pinout

TL3845P Current-Mode PWM Controller:Description;Features and Pinout

Q: When can make it suitable for driving N-channel MOSFETs?

When in the OFF state, the output stage is low.

Sophie

Published: 25 February 2022 | Last Updated: 25 February 2022

10633

TL3845P

Texas Instruments

8 Terminals 7.6V~30V 8-Pin TL3845 DC to DC converter IC SWITCHING REGULATOR 1 Outputs 100kHz Transistor Driver

Purchase Guide

8 Terminals 7.6V~30V 8-Pin TL3845 DC to DC converter IC SWITCHING REGULATOR 1 Outputs 100kHz Transistor Driver

TL3845Pis a current-mode PWM Controller. This passage is going to introduce TL3845P description, features, pinout, and so on.

This video is going to introduce the function of TL3845P.

Current Mode PWM SMPS controller UC3842 /UC3843 / UC3844 / UC3845 Functional Description

Catalog

TL3845P Description

The TL3845P is a current-mode PWM Controller that includes all of the features required to implement off-line or DC-to-DC fixed-frequency current-mode control schemes with a minimal number of external components. An under-voltage lockout (UVLO) with a start-up current of less than 1mA and a precision reference trimmed for accuracy at the error amplifier input are two of the internally implemented circuits. Other internal circuits include logic to ensure latched operation, a PWM compactor (which also provides current-limit control), and a totem-pole output stage designed to source or sink high-peak current. When in the OFF state, the output stage is low, making it suitable for driving N-channel MOSFETs.

TL3845P Features

Optimized for Off-line and DC-to-DC Converters
Low Start-Up Current (< 1 mA)
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
Error Amplifier With Low Output Resistance
Designed to be Interchangeable with UC2842 and UC3842 Series

TL3845P Pinout and Configuration

name	Pin NO.	TYPE	DESCRIPTION
COMP	1	I/O	Error amplifier compensation pin
GND	5	-	Device power supply ground terminal
ISENSE	3	I	Current sense comparator input
NC	-	-	Do not connect
OUTPUT	6	O	PWM Output
POWER GROUND	-	-	Output PWM ground terminal
REF	8	O	Oscillator voltage reference
RT/CT	4	I/O	Oscillator RC input
VC	-	-	Output PWM positive voltage supply
VCC	7	-	Device positive voltage supply
VFB	2	I	Error amplifier input

TL3845P Manufacturer

Texas Instruments has a 75-year history of innovation with a strong commitment to education. Their corporate commitment to STEM education started with the company’s founders and remains stronger than ever today. They believe in investing in education in order to fuel the talent base needed to continue advancing engineering innovation across the world. Their commitment to education is a strong part of our legacy and remains one of our highest priorities.

TL3845P Package

Pin nb	Package type	Ind std	JEDEC code	Package qty	Carrier	Device mark	Width(mm)	Length(mm)	Thick(mm)
8	P	PDIP	R-PDIP-T	50	TUBE	TL3845P	6.35	9.81	3.9

Specifications

TL3845P Functional Block Diagram

functional block diagram.jpg

Trend Analysis

Datasheet PDF

Download datasheets and manufacturer documentation for Texas Instruments TL3845P.

Parts with Similar Specs

The three parts on the right have similar specifications to Texas Instruments & TL3845P.

Image
Part Number
Manufacturer
Package / Case
Number of Pins
Number of Outputs
Frequency - Switching
Quiescent Current
Moisture Sensitivity Level (MSL)
Height
Supply Voltage
View Compare
TL3845P
Texas Instruments
8-DIP (0.300, 7.62mm)
8
1
100kHz
11 mA
1 (Unlimited)
5.08 mm
15 V
TL3843P
Texas Instruments
8-DIP (0.300, 7.62mm)
8
1
Up to 500kHz
11 mA
1 (Unlimited)
5.08 mm
15 V
TL3845P
VS
TL3843P
TL3844P
Texas Instruments
8-DIP (0.300, 7.62mm)
8
1
Up to 500kHz
11 mA
1 (Unlimited)
5.08 mm
15 V
TL3845P
VS
TL3844P
TL3842P
Texas Instruments
8-DIP (0.300, 7.62mm)
8
1
Up to 500kHz
11 mA
1 (Unlimited)
5.08 mm
15 V
TL3845P
VS
TL3842P

Frequently Asked Questions

Who includes all of the features required to implement off-line or DC-to-DC fixed-frequency current-mode control schemes?

TL3845P

What is the TL3845P manufacturer?

Texas Instruments

When can make it suitable for driving N-channel MOSFETs?

When in the OFF state, the output stage is low.

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TL3845P

Texas Instruments

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