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UTC Unisonic PWM controllers

Quick Overview

UTC has been making progress possible for decades. UTC is a global semiconductor company that designs, manufactures, tests and sells PWM controllers. UTC's products help our customers efficiently manage power, accurately sense and transmit data and provide the core control or processing in their designs.

  • PWM DC-DC controller
  • PWM controller switch

UTC PWM controllers

Details

UTC PWM controllers play a crucial role in modern electronics by providing efficient and precise control of power delivery, making them essential components in a wide range of electronic systems and devices. PWM controllers use technology similar to other modern high quality battery chargers called Pulse Width Modulation. When a battery voltage reaches the regulation set point, the PWM algorithm slowly reduces the charging current to avoid heating and gassing of the battery, yet the charging continues to return the maximum amount of energy to the battery in the shortest time. The result is a higher charging efficiency, rapid recharging, and a healthy battery at full capacity. Choose from PWM current mode controller and PWM DC-DC controller to PWM controller switch and PWM controller IC available from UTC.

Part No. Features Vcc(Max) Pd Ic(Io) package
L2800 Low Voltage Switching Regulator Controller 1.8V~15V 570/580mW ±40mA SOP-8 TSSOP-8
U3525 Regulating PWM IC 8V~35V 1000mW 100mA DIP-16 SOP-16
BA9741 Two-Channel Switching Regulator Controller 3.6v~36V 500/650mW 120mA DIP-16 SOP-16 TSSO...
U9751B Double Channels PWM Controller 38V - 450mA DIP-16 SOP-16 SSOP...
TL5001 Pulse width Modulation Control Circuits 3.6v~40V - 20mA DIP-8 SOP-8
TL494 Voltage Mode PWM Control IC 7V-40V 1000mW 200mA DIP-16 SOP-16 TSSO...
51494 Voltage Mode PWM Control IC with Power Good S... 42V 1500mW 250mA DIP-16 SOP-16
TL1451 Dual Pulse width Modulation Control Circuits 3.6V~50V 1000/500/700mW 20mA DIP-16 SOP-16 TSSO...
UC2842B UC2843B PWM Controllers with Low Start-Up Current 30V 800/1250 1A SOP-8 DIP-8
UC3842A UC3843A PWM Controllers with Low Start-Up Current 30V 1000/500mW 1A DIP-8 SOP-8
UC3842B UC3843B PWM Controllers with Low Start-Up Current 30V 1250/702mW 1A DIP-8 SOP-8
UC3844 UC3845 PWM Controllers with Low Start-Up Current 30V 1250/862mW 1A DIP-8 SOP-8
UC2844 UC2845 PWM Controllers with Low Start-Up Current 30V 862mW 1A DIP-8 SOP-8
UC3848 HIGH PERFORMANCE CURRENT 22V 862mW 45?Amax DIP-8 SOP-8
UC3842G Current Mode PWM Controllers 30V - ±1A DIP-8 SOP-8
TL594 pulse-width-modulation control circuit 41 - 100 SOP-16,DIP-16
UC3846 low cost power-saving mode pwm controller 21 - 7 DIP-8
UPS4602 high performance current mode power switch wi... 30 0.3 8 DIP-8
UC34463 200khz, 2a pwm buck switching regulator 45V Internally limited 2A SOP-8/HSOP-8
UC3863 low cost power-saving mode pwm controller 30 - - SOT-26
USR1101 5V/12V synchronous buck pwm dc-dc controller 16 0.625 - SOP-8
P4596 pwm control 3a step-down converter 40 Internally limited - HSOP-8
USR1051 3 A synchronous buck regulator 20 - - HSOP-8
UCS1201 low voltage synchronous buck controller 20 -   SOP-8
P2172 100khz, 1.25a high efficiency switching 60 - - DIP-8
3520 pc power supply pwm supervisor 5.5 200 - DIP-16
UC3873 low cost power-saving mode pwm controller 30 - - SOT-26
UM68TXX 128 notes dual tone melody generator pwm 0V~5V - - TO-92
UC3837 low cost power-saving mode pwm controller 23 - - SOT-26
US3651 high precision cc/cv primary-side pwm power s... 26 - - DIP-8
U8021 voltage mode pwm controller with linear powe... 18 - - SOP-14
US3702 high performance current mode power switch wi... 30 - - DIP-8
USR1021 3a synchronous buck regulator Vin= 6~18V Iin= 3.5~5mA Ifb= 200nA SOP-8
LD1596 2A 150kHz 40V buck dc/dc converter with led d... 45 Internally limited IL=3A SOP-8
ULD3380 high efficiency pwm buck led driver controlle... 40 0.392 Iqc=5mA SOT-26
P34563 pwm control 3a step-down converter 38 (TJ -TA)/ θJA 3 HSOP-8
P1596 150KHZ, 1.5A PWM buck dc/dc converter 28 Internally limited 2.25 TO-220B / TO-220-5 /...
US2651 high precision low cost mcm power switch 7 - - DIP-8 SOP-8
UC3856 low cost power-saving mode pwm controller fo... 30 VFB = -0.3~7V 20mA SOT-26
US3706 current mode pwm power switch 30 - 3.0 TO-220F-6
US1652 primary-side regulation pwm power switch VDD= -0.3~33V VCS= -0.3~7V Freq= 50KHz SOP-8
UC3800 low cost power-saving mode pwm controller 30 VFB = -0.3~6V FSW = 70KHz SOP-8
US3652 high precision cc/cv primary-side pwm power s... IDD=10mA VDD_OVP =28V BVDSS =600V DIP-8/DIP-7A
USR3651S high precision cc/cv primary-side pwm power s... IDD=10mA Vst =25V Ist =700uA SOP-8
UC3973 low cost power-saving mode pwm controller VDD= 9~ 24V VFB = -0.3~7V IFB= 240uA SOP-8
UC3873B low cost power-saving mode pwm controller 30 - - SOT-26
3563 pc power supply supervisors 30 1000/625 10nA DIP-8 SOP-8
US1651 primary-side regulation pwm power switch 33 - - SOP-8
UCSR3654 high precision cc/cv primary-side pwm power s... 7 IDD=10mA - DIP-8
UCSR3654S high precision cc/cv primary-side pwm power s... VCS = -0.3~7 VST = 25V IST = 700μA DIP-7 DIP-8
UCSR3651S high precision cc/cv primary-side pwm power s... IDD= 10mA VST = 25V IST = 700μA DIP-7 SOP-8
US2351 high precision low cost mcm power switch VDD= -0.3~V     SOP-8
US2351 high precision low cost mcm power switch VDD= 13V IDD OP = 2.5mA IDD ST = 20μA SOP-8
UCS1650S high performance current mode power switch 32 Vfb = -0.3 ~ 6.5V Iop = 2.5mA SOP-8
UCS1651S high performance current mode power switch 32 Vfb = -0.3 ~ 6.5 V Iop= 2.5mA SOP-8
UCS1652S high performance current mode power switch 32 Vfb = -0.3 ~ 6.5 V Iop= 2.5mA DIP-8 SOP-8
UCS1653S high performance current mode power switch Vfb=-0.3 ~ 6.5 V Iop= 2.5mA Tsofts= 4 ms DIP-8
UCS1654S high performance current mode power switch 32 Vfb = -0.3 ~ 6.5 V Iop = 2.5mA DIP-8
UCS1655S high performance current mode power switch 32 Vfb= -0.3 ~ 6.5 V Iop= 2.5mA DIP-8
UC3876D low cost power-saving mode pwm controller 32V Vcomp = -0.3~7 V Ist = 0.25 mA SOP-8
USR3652S high precision cc/cv primary-side pwm power s... Vcomp = -0.3~7V Idd = 10 mA Vdd_ovp = 28 V DFIP-8
P1888 pwm control 3a step-down converter 23 Internally limited Vfb= 1.28V SOP-8
UPSR104 high precision cc/cv primary-side pwm control... 7 IDD_OP =3mA OVP =29V SOT-26
UCSR3652S high precision cc/cv primary-side pwm power ... VST= 25V IST= 700μA VTH(ON)= 13.5 ~ 16V DIP-7A/DIP-8/SOP-8
UCS1603S high performance current mode power switch 24 PIN_MAX=18W VCC(MIN)=6.5 ~ 9.5V DIP-8
UCS1604S high performance current mode power switch 24 PIN_MAX=22W VCC(MIN)=6.5 ~ 9.5V DIP-8
UCS1605S high performance current mode power switch 24V PIN_MAX=28W VCC(MIN)=6.5 ~ 9.5V DIP-8
UCS1602S high performance current mode power switch 32 IST =15μA IOP =5.5mA DIP-8 SOP-8
USRB01A high precision cc/cv primary side switch VDD = -0.3 ~ 30V VVC = -0.3 ~ 7 V VC = -0.3 ~ 700 V SOP-8
UC3869A high voltage green mode pwm controller VDD = 10 ~ 24V IHV = 0.75mA leakage = 10 μA DIP-8 SOP-8
UT213 +3.0v to +5.5v power supply, 120kbps, multich... 6V 870 ICC = 11~ 20 mA SOP-28 SSOP-28
UC3837L low cost power-saving mode pwm controller VDD= 30 V VFB= -0.3 ~ 7V TOPR= -40 ~ +125°C SOT-26
UC3875A low cost power-saving mode pwm controller fo... VDD= 35V VFB= -0.3 ~ 7V TOPR= -40 ~ +125°C SOP-8
UTRS3227 +3.0v to +5.5v power supply, 1mbps, rs-232 li... 6V 870 mW Icc= 0.3~ 2.0 mA SSOP-16
UC3863A low cost power-saving mode pwm controller Vdd = 10 ~ 24V Istr = 2~ 15 μA Iop = 0.8~ 1.8 mA SOT-26 SOP-8 HSOP-8
UCS1657S high performance current mode power switch 10 ~ 24 V IST= 2 15 μA IOP= 3.8 5.5 mA TO-220F-6
UCS1700S high performance current mode power switch 10 ~ 24 V ISTR = 2~ 15 μA IOP =2.2 5.5 mA DIP-7A/DIP-8/SOP-8
UCS1701S high performance current mode power switch 10 ~ 24 V ISTR = 2~ 15 μA IOP= 2.8 5.5 mA DIP-7A/DIP-8/SOP-8
UCS1702S high performance current mode power switch 10 ~ 24 V ISTR = 2~ 15 μA IOP= 2.8 5.5 mA DIP-7A/DIP-8/SOP-8
UCS1703S high performance current mode power switch 10 ~ 24 V ISTR = 2~ 15 μA IOP= 3.0 5.5 mA DIP-7A/DIP-8/SOP-8
UCS1704S high performance current mode power switch 10 ~ 24 V ISTR = 2~ 15 μA IOP= 3.2 5.5 mA DIP-7A/DIP-8/SOP-8
UCS1705S high performance current mode power switch 10 ~ 24 V ISTR = 2~ 15 μA IOP = 3.5 5.5 mA DIP-7A/DIP-8
US1602 high performance current mode power switch 10 ~ 24 V VFB -0.3 ~ 6.5 V IST= 2 ~15 μA DIP-8 SOP-8
USR5VA10 synchronous rectifier 15 V VPN= 45 V ICC= 80 ~ 260 μA SOT-223
USR3652 high precision cc/cv primary-side pwm power s... VCS = -0.3 ~ 7 V VTH(ON)= 13.5 ~ 16 V VTH(OFF)= 8.2 ~ 10.5... SOP-8
USR3651 high precision cc/cv primary-side pwm power s... 16     SOP-8
US2652SQ low cost power-saving mode pwm controller 28 V 400 mW Ich ≥0.5 mA DIP-7A
UC3873A low cost power-saving mode pwm controller 36 V     SOT-26
UC3873C low cost power-saving mode pwm controller 36 V     SOT-26
UC3816A UC3816B low cost power-saving mode pwm controller 36 V 400   SOT-26
UC3869H high voltage green mode pwm controller 10 ~ 24 V V FB_Open= 5.4 V V FB(IN) = 1.35 V DIP-8 SOP-8
UC3873H low cost power-saving mode pwm controller V DD= 10 ~ 24 V I STR =2 ~ 15 μA I OP = 0.8 ~ 1.8 mA SOT-26
UC3853A current mode pwm controller for forward and 28V     SOP-8
USR5V10X high performance synchronous rectifier V IN= -0.6 ~ 7 V V DD= 4 ~ 5.5 V   SOP-8
USR3654A high precision cc/cv primary-side pwm power s... I DD= 10 mA     DIP-7A DIP-8
U3525U regulating pwm ic 4.5 ~ 35V F O =100 ~ 400K Hz   DIP-16 SOP-16
UC3801 low cost power-saving mode pwm controller -0.3 ~ 36 V 400 mW   SOT-26
UCQ3879 low cost power-saving mode pwm controller -0.3 ~ 36 V 400 mW   SOP-8
UC3916A low cost power-saving mode pwm controller -0.3 ~ 36 V 400 mW   SOP-8
UC3849 current mode pwm controller 25V     SOP-8

PWM (Pulse Width Modulation) controllers are electronic devices used to regulate the power delivered to electrical loads by adjusting the duty cycle of a pulsating signal. Here's a breakdown of PWM controllers:

  1. Basic Principle: PWM controllers work on the principle of rapidly switching a power supply on and off at a fixed frequency. By adjusting the width (or duty cycle) of the on-time versus the off-time, the average power delivered to the load can be controlled. This modulation technique allows for efficient control of power delivery.

  2. Applications: PWM controllers find applications in a wide range of systems where precise control of power delivery is required. Common applications include motor speed control, LED dimming, voltage regulation, battery charging, and power supplies for various electronic devices.

  3. Efficiency: PWM controllers are known for their high efficiency compared to linear regulators, especially when regulating high currents or voltages. This is because they operate in an on/off switching mode, minimizing power losses and dissipating less heat.

  4. Control Methods: PWM controllers can be controlled in various ways, including analog control using a voltage or current signal, digital control using microcontrollers or digital signal processors (DSPs), or through feedback mechanisms such as voltage or current regulation loops.

  5. Types of PWM Controllers:

    • Analog PWM Controllers: These controllers use analog circuitry to generate PWM signals. They are often used in simple applications where precise control is not required.
    • Digital PWM Controllers: These controllers use digital signal processing techniques to generate PWM signals. They offer greater flexibility and control precision, making them suitable for complex systems and applications requiring high accuracy.
    • Integrated PWM Controllers: Some microcontrollers and specialized ICs come with built-in PWM functionality, simplifying system design and reducing component count.

  6. Features: PWM controllers may include additional features such as overcurrent protection, overvoltage protection, soft-start capabilities, and synchronization options for multi-phase operation.

  7. Design Considerations: When selecting a PWM controller, factors such as operating frequency, output voltage/current range, efficiency, protection features, and control interface compatibility should be considered to ensure optimal performance and reliability in the target application.