ON Manuals

NCP1308 PWM Current-Mode Controller for Free-Running Quasi-Resonant Operation

NCP1086 1.5 A Adjustable and 3.3 V Fixed Output Linear Regulator

The NCP1086 is a 1.5A adjustable and 3.3V fixed output linear regulator that can be used as a post regulator and microprocessor supply. It has fast loop response and low dropout voltage, making it ideal for applications where low voltage operation and good transient response are important.

The NCP1200A is a PWM current-mode controller suitable for universal off-line supplies featuring low standby power. It enhances the previous NCP1200 series by offering a reduced optocoupler current together with an increased drive capability. With its novel concept, the circuit allows the implementation of complete off-line AC-DC adapters, battery chargers, or SMPS where standby power is a key parameter. The controller operates at a fixed frequency of 40 kHz, 60 kHz, or 100 kHz and draws power from the high-voltage rail, eliminating the need for an auxiliary winding. This simplifies the design task in battery charger applications. The current-mode control provides excellent audio susceptibility and inherent pulse-by-pulse control. When the current setpoint falls below a given value, the IC automatically enters the skip cycle mode, providing excellent efficiency at light loads. This occurs at a user-adjustable low peak current, ensuring no acoustic noise. The NCP1200A features efficient protective circuitry that disables the output pulses in the presence of an overcurrent condition, entering a safe burst mode to attempt a restart. The device auto-recovers once the fault has been resolved.

NCP1200A is a PWM current-mode controller for universal off-line supplies featuring low standby power.

NCP1200A is a PWM current-mode controller that can achieve low standby power for universal offline power supplies. It is housed in SOIC-8 or PDIP-8 package, and can reduce optocoupler current while increasing drive capability. Due to its novel concept, the circuit can implement complete offline AC-DC adapters, battery charger or a SMPS where standby power is a key parameter. The controller operates at a fixed 40 kHz, 60 kHz or 100 kHz, and supplies itself from the high-voltage rail, avoiding the need for an auxiliary winding. This feature naturally eases the designer's task in battery charger applications. Finally, current-mode control provides an excellent audio-susceptibility and inherent pulse-by-pulse control. When the current setpoint falls below a given value, e.g. the output power demand diminishes, the IC automatically enters the so-called skip cycle mode and provides excellent efficiency at light loads. Because this occurs at a user adjustable low peak current, no acoustic noise takes place. The NCP1200A features an efficient protective circuitry which, in presence of an overcurrent condition, disables the output pulses while the device enters a safe burst mode, trying to restart. Once the default has gone, the device auto-recovers.

The NCP1200 is a PWM current-mode controller for low-power universal off-line supplies from Semiconductor Components Industries, LLC. It is housed in SOIC-8 or PDIP-8 packages, and features a small size, low power consumption, and low noise.

MC74AC08, MC74ACT08 Quad 2-Input AND Gate Outputs Source/Sink 24 mA 'ACT08 Has TTL Compatible Inputs Pb-Free Packages are Available

MC74AC138/D is a 1-of-8 decoder/demultiplexer produced by ON Semiconductor. This device has high speed and multiple input enable functions, making it ideal for high speed bipolar memory chip select address decoding.

The MC74AC139/74ACT139 is a high-speed, dual 1-of-4 decoder/demultiplexer.

The MC74AC157/74ACT157 is a high-speed quad 2-input multiplexer. Four bits of data from two sources can be selected using the common Select and Enable inputs. The four outputs present the selected data in the true (noninverted) form. The MC74AC157/74ACT157 can also be used as a function generator.

MC74AC240/74ACT240 is an octal buffer and line driver designed to be employed as a memory address driver, clock driver and bus oriented transmitter or receiver which provides improved PC board density.

MC74AC240/D MC74AC240, MC74ACT240 Octal Buffer/Line Driver with 3−State Outputs is an octal buffer and line driver designed to be employed as a memory address driver, clock driver and bus oriented transmitter or receiver which provides improved PC board density.

The MC74AC244/74ACT244 is an octal buffer and line driver designed to be employed as a memory address driver, clock driver and bus oriented transmitter/receiver which provides improved PC board density.