DESCRIPTION M62281P/FP is designed as a high speed current mode PWM Control IC. This small10 pin package contains many functions and protection circuits alLowing simpler peripheral circuit and compact set design. This IC can operate high speed switching (700kHz max.) with high speed current sense comparator and current limiting circuit.
FEATURES ● 700kHz applicable to MOS-FET • Output current Io(peak) = ±1A • Totem pole output ● CURRENT SENSE terminal separate form CLM terminal makes SMPS strong in noise. ● High speed pulse-by-pulse current limiting ● Timer type latch protection circuit with OVP(external reset is possible) ● Soft start operation is possible (with dead time Control) ● Built-in OPAmp for feedback Control (photo coupler can be driven) ● Small start-up current 180µA ● Start-up voltage 12.5V, Stop voltage 8.3V
Micrel’s MIC2184 is a high efficiency PWM buck Control IC. With its wide input voltage range of 2.9V to 14V, the MIC2184 can be used to efficiently step voltages down in 1- or 2-cell LiIon battery Powered applications, as well as in fixed 3.3V, 5V, or 12V systems.
Efficiencies over 90% are achievable over a wide range of load conditions with the MIC2184’s PWM Control scheme. The operating frequency can be divided by two by raising the FREQ/2 pin to VDD. This alLows the user to optimize efficiency versus board space. It also alLows the MIC2184 to be externally synchronized to frequencies beLow its nominal 400KHz.
• Input voltage range: 2.9V to 14V
• >90% efficiency
• Oscillator frequency of 400kHz
• Frequency divide-by-two pin
• Frequency sync to 600kHz
• FrequOut oscillator output alLows simple charge pump implementation in Low voltage systems
• 1.245V reference output
• Front edge blanking
• 5Ω output driver
• Soft start
• PWM current mode Control
• 1µA shutdown current
• Cycle-by-cycle current limiting
• Frequency foldback short circuit protection
• Adjustable under-voltage lockout
• 16 pin narrow-body SOIC and QSOP package options
• 3.3V to 2.5V/1.8V/1.5V conversion
• DC Power distribution systems
• Wireless Modems
• ADSL line cards
• 1-and 2-cell Li Ion battery operated equipment
• Satellite Phones
The FA3641P(N) and FA3647P(N) are the PWM type switching Power supply Control ICs that can directly drive Power MOSFET. These ICs use a CMOS device with high dielectric strength (30V) to implement Low Power consumption. They feature a number of functions that are equivalent to those of the FA531X series consisting of bipolar devices.
General Description Micrel’s MIC2185 is a high efficiency synchronous boost PWM Control IC. With its wide input voltage range of 2.9V to 14V, the MIC2185 can be used to efficiently boost voltages in 1- or 2-cell Li Ion battery Powered applications, as well as fixed 3.3V and 5V systems. Its Powerful 5Ω output drivers alLow the MIC2185 to supply large output currents with the selection of the proper external MOSFETs. With it’s fixed frequency PWM architecture, and easily synchronized drive, the MIC2185 is ideal for noise-sensitive telecommunications applications. The nominal 400kHz operating frequency of the MIC2185 can be divided by two, alLowing the device to be externally synchronized to frequencies beLow 400kHz. The MIC2185 also features a Low current shutdown mode and a programmable undervoltage lockout. A skipped pulse mode of operation can be manually set to achieve higher efficiencies at light load conditions. The MIC2185 is available in a 16 pin SOIC package and 16 pin QSOP package with an ambient temperature operating range from –40°C to 85°C.
Features • Input voltage range: 2.9V to 14V • 95% efficiency • Oscillator frequency of 200kHz/400kHz • Frequency sync to 600kHz • 0.5µA shutdown current • Two 5Ω output drivers • Front edge blanking • PWM current mode Control • Cycle-by-cycle current limiting • Frequency foldback protection • Adjustable under-voltage lockout • Precision 1.245V reference output • 16 pin SOIC narrow body package
Applications • 3.3V to 5V conversion in telecom systems • Satellite phones • Cable modems • 1-and 2-cell Li Ion battery operated equipment
Description U6081B is a PWM IC in bipolar technology for the Control of an N-channel Power MOSFET used as a high side switch. The IC is ideal for the use in the brightness Control (dimming) of lamps e.g., in dashboard applications.
Features ● Pulse width modulation up to 2 kHz clock frequency ● Protection against short circuit, load dump overvoltage and reverse VS ● Duty cycle 0 to 100% ● Output stage for Power MOSFET ● Interference and damage protection according to VDE 0839 and ISO/TR 7637/1. ● Ground wire breakage protection ● Charge pump noise suppressed
The LB1946 is stepping motor drive IC that implements PWM current Control bipolar drive with a fixed off time. This IC features 15-current setting levels using a fixed VREF voltage and supports for microstepping drive from 1-2 phase excitation to 4W1-2 phase excitation drive. This device is optimal for driving stepping motors such as those used for carriage drive and paper feed in printers.
• PWM current Control with a fixed off time
• Logic input serial-parallel converter (alLows 1-2, W1-2, 2W1-2, and 4W1-2 phase excitation drive)
• Current attenuation switching function (with sLow decay, fast decay, and mixed decay modes)
• Built-in upper and Lower side output diodes
• Simultaneous on state prevention function (through current prevention)
• Noise canceller function
• Thermal shutdown circuit
• Shutoff on Low logic system voltage circuit
• Low-Power mode Control pin
• PWM current Control stepping motor drivers
DESCRIPTION M62213P/FP is designed as a general purpose high-speed PWM Control IC. This small 10 pin package contains many function and protection circuits alLowing simpler peripheral circuits and compact set design. This IC can operate high speed switching (700kHz Max) with high speed PWM comparator and current limiting circuit.
FEATURES • 700kHz operation to MOS- FET • Output current Io= ±1A • Totem pole output • Timer type latch protection circuit with OVP • Soft start operation is possible (with dead time Control) • Built-in OPAmp for feedback Control (photo coupler can be driven) • High speed pulse-by-pulse current limiting • Small size 10-pin SOP package
■ GENERAL DESCRIPTION
The NJW4303 is a 3-Phase Brushless DC Motor Control pre-driver IC with PWM Control. It generates the most optimal current fLow patterns by receiving rotor magnetic pole detection signals from hall elements of 3-phase brushless motor.
▪ Supply Voltage : 9.0V ~ 35V
▪ PWM Pre Driver : Upper = Pch / Lower = Nch
▪ PWM Control Circuit
▪ Forward / Reverse Detection : Changeable while Roating
▪ PWM Oscillation Circuit : Setting by External Capacitor
▪ Protection Circuit : ILimit, UVLO, TSD, LD
▪ Soft Start Function
▪ Short Brake Function
▪ ON/OFF Function : Stop with S/S Pin
▪ 120º / 60º Phase Difference Change Function
▪ Multi FG Output : 2 bit Input Change Type
▪ Controllable Dead Time Settings
▪ Package : SSOP-32
GENERAL DESCRIPTION The M62502 is a Controller for a deflection system of CRT display monitors. It performs a stable PWM Control over a wide fluctuation of external signals, thanks to the built-in trigger mode oscillator. The IC is suitable for an application to a high voltage drive and a horizontal output correction of CRT monitors because of its folLowing circuits and functions; • Under Voltage Lock Out circuit (UVLO) • Soft-start function
FEATURES • PWM output synchronized with external signals • Wide PWM Control frequency 15kHz to 150kHz • Soft start function • Low voltage malfunction protection circuit start Vcc > 9V stop Vcc < 6V