Mfr Part #:

TL3843BDR-8

Q: What package does the TL3843BDR-8 come in?

8-SOIC (0.154", 3.90mm Width) surface mount package.

Q: What are the undervoltage lockout thresholds?

8.4V (on) and 7.6V (off) for TLx843B and TLx845B devices.

The Texas Instruments TL3843BDR-8 is a current mode PWM controller designed for DC/DC switching regulators. It operates at frequencies up to 500kHz and supports a wide input voltage range.

✓ Total Stock: 26,567 pcs

$ Price Range: $0.15

TL3843BDR-8 Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Optech Co.,Limited ✓ Non-Authorised Inventory information	26,567 pcs On Request	26567 pcs	On Request	1	On Request	On Request	18+	On Request	On Request

TL3843BDR-8 Description

Short technical summary and product information.

The TL3843BDR-8 from Texas Instruments is a high-performance current-mode Pulse Width Modulation (PWM) controller. It is designed to facilitate the implementation of off-line or DC-to-DC fixed-frequency current-mode control schemes with minimal external components.

This controller features a low start-up current of less than 0.5mA and a trimmed oscillator discharge current. It supports current mode operation up to 500kHz and includes automatic feed-forward compensation and latching PWM for cycle-by-cycle current limiting. The device has an internally trimmed reference with undervoltage lockout (UVLO) and a high-current totem-pole output. The UVLO thresholds for this specific device are typically 8.4V (on) and 7.6V (off), making it suitable for various power supply applications.

The TL3843BDR-8 operates within a voltage range of 7.6V to 30V and has a maximum duty cycle of 96%. It is characterized for operation from 0°C to 70°C. The controller is available in an 8-SOIC package, suitable for surface mount applications.

Key features include its ability to drive N-channel MOSFETs, double-pulse suppression, and support for Boost, Flyback, and Forward topologies. It is ideal for applications requiring efficient and stable power conversion.

TL3843BDR-8 Quick Information

Product Type: DC DC Switching Controller

Series: TLx84xB

Canonical Name: TL3843BDR-8 Current Mode PWM Controller

Subcategory: Switching Regulators

TL3843BDR-8 Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

TL3843BDR-8 Estimated Pricing

Qty	Low	High
1+	$0.15	$0.15

Estimated market price range - modelled values for guidance only, not live distributor offers.

TL3843BDR-8 Features

Current mode PWM controller for DC/DC converters.
Operates up to 500kHz switching frequency.
Wide 7.6V to 30V operating voltage range.
8-SOIC package for surface mount applications.
Low start-up current (<0.5mA).

TL3843BDR-8 Applications

Ideal for switching regulators.
Suitable for transformer-coupled converters.
Used in off-line power supplies.
Supports Boost, Flyback topologies.

TL3843BDR-8 FAQs

7 frequently asked questions generated from this part’s specifications.

What is the operating voltage range of the TL3843BDR-8?

7.6V to 30V.

What package does the TL3843BDR-8 come in?

8-SOIC (0.154", 3.90mm Width) surface mount package.

What is the operating temperature range?

0°C to 70°C.

What is the maximum operating frequency?

Up to 500kHz.

What is the maximum duty cycle?

96%.

What topologies does the TL3843BDR-8 support?

Boost, flyback, and forward.

What are the undervoltage lockout thresholds?