This website uses cookies. By using this site, you consent to the use of cookies. For more information, please take a look at our Privacy Policy.

UC3843B

High Performance Current Mode PWM Controller

email Email: [email protected]
skype Skype: live:.cid.ab6b29428937b76
tel Tel: +852 95804164

UC3843B General Description

The UC3842B, UC3843B series are high performance fixed frequency current mode controllers. They are specifically designed for Off-Line and dc-to-dc converter applications offering the designer a cost-effective solution with minimal external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.

Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle-by-cycle current limiting, programmable output deadtime, and a latch for single pulse metering.

These devices are available in an 8-pin dual-in-line and surface mount (SO-8) plastic package as well as the 14-pin plastic surface mount (SO-14). The SO-14 package has separate power and ground pins for the totem pole output stage.

The UCX842B has UVLO thresholds of 16 V (on) and 10 V (off), ideally suited for off-line converters. The UCX843B is tailored for lower voltage applications having UVLO thresholds of 8.5 V (on) and 7.6 V (off).

Key Features

  • Trimmed Oscillator for Precise Frequency Control
  • Oscillator Frequency Guaranteed at 250 kHz
  • 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 Startup and Operating Current
  • Pb-Free Packages are Available

Specifications

Product Category onsemi Factory Pack Quantity 98

Service Policies and Others

After-Sales & Settlement Related

payment Payment

Payment Method

hsbc
TT/Wire Transfer
paypal
Paypal
wu
Western Union
mg
Money Gram

For alternative payment channels, please reach out to us at:

[email protected]
shipping Shipping & Packing

Shipping Method

fedex
Fedex
ups
UPS
dhl
DHL
tnt
NTN
Packing

AVAQ determines and packages all devices based on electrostatic discharge (ESD) and moisture sensitivity level (MSL) protection requirements.

Warranty Warranty
365-Day Product Quality Guarantee

365-Day Product

Quality Guarantee

We promise to provide 365 days quality assurance service for all our products.

Reviews

You need to log in to reply. Sign In | Sign Up

LT1640ALCS8#PBF

LT1640ALCS8#PBF

Analog Devices, Inc

LTC4259ACGW

LTC4259ACGW

Analog Devices

MAX16046ATN+

MAX16046ATN+

Analog Devices, Inc

SiP11206DQP-T1-E3

SiP11206DQP-T1-E3

Vishay Intertechnology, Inc

LP38501TS-ADJ/NOPB

LP38501TS-ADJ/NOPB

Texas Instruments, Inc

LTC3868EUH#PBF

LTC3868EUH#PBF

Analog Devices, Inc

UC2845D

UC2845D

Texas Instruments, Inc

ADP5310AREZN-R7

ADP5310AREZN-R7

Analog Devices, Inc

BTS660P-E3180A

SG7812AT/883B

TPS54232DR

TPS73501DRVR

TPS73501DRBR

UCC25600DR

LM3150MH/NOPB

TPS63031DSKT

TPS54140DGQR

TPS61175PWPR

TPS2553DBVT-1

TPS2553DBVT

LT4356HMS-3#TRPBF

XBP9B-DMUT-002

KFA5-SR2-EX2.W

JANTX2N2222AUB

CR330

HG1G-4VT22TF-B

LM324N

TLP281-4

Availability: 6374 PCS

+BOM
Qty. Unit Price Ext. Price
5+ $0.184 $0.92
50+ $0.149 $7.45
150+ $0.131 $19.65
500+ $0.101 $50.50
2500+ $0.097 $242.50
5000+ $0.094 $470.00

The prices below are for reference only.

INQUIRY NOW

Top Sellers

Inquiry Add To Bom