Texas Instruments UC3525BDW
- Part Number:
- UC3525BDW
- Manufacturer:
- Texas Instruments
- Ventron No:
- 3288604-UC3525BDW
- Description:
- Enhanced 35V, Dual 0.4A 400KHz PWM controller with Low output when off, 0C to 70C
- Datasheet:
- uc3525b
- TopologyBoost
- Control modeVoltage
- Duty cycle (max) (%)49
- Switching frequency (max) (kHz)500
- FeaturesAdjustable switching frequency
- UVLO thresholds on/off (V)7/6.5
- Operating temperature range (°C)0 to 70
- RatingCatalog
- Gate drive (typ) (A)0.4
- Vin (max) (V)40
The UC1525B/1527B series of pulse width modulator integrated circuits are designed to offer improved performance and lowered external parts count when used in designing all types of switching power supplies. The on-chip 5.1V buried zener reference is trimmed to ±0.75% and the input common-mode range of the error amplifier includes the reference voltage, eliminating external resistors. A sync input to the oscillator allows multiple units to be slaved or a single unit to be synchronized to an external system clock. A single resistor between the CT and the discharge terminals provide a wide range of dead time adjustment. These devices also feature built-in soft-start circuitry with only an external timing capacitor required. A shutdown terminal controls both the soft-start circuitry and the output stages, providing instantaneous turn off through the PWM latch with pulsed shutdown, as well as soft-start recycle with longer shutdown commands. These functions are also controlled by an undervoltage lockout which keeps the outputs off and the soft-start capacitor discharged for subnormal input voltages. This lockout circuitry includes approximately 500mV of hysteresis for jitter-free operation. Another feature of these PWM circuits is a latch following the comparator. Once a PWM pulse has been terminated for any reason, the outputs will remain off for the duration of the period. The latch is reset with each clock pulse. The output stages are totem-pole designs capable of sourcing or sinking in excess of 200mA. The UC1525B output stage features NOR logic, giving a LOW output for an OFF state. The UC1527B utilizes OR logic which results in a HIGH output level when OFF.
UC3525 Buck Boost Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull Tube e4 DC to DC switching controller 50ns 100mA 473.692182mg 18V
IC, CONTROLLER, PWM, REG, SMD; Tension, entrée: 35V; Tension, sortie: 18V; Courant, sortie: 100mA; Tension, alimentation min.: 8V; Tension, alimentation max..: 35V; Type de boîtier de contrôleur: SOIC; Nombre de broches: 16Broc
Ic, Controller, Pwm, Reg, Smd; Input Voltage:35V; Output Voltage:18V; Output Current:100Ma; Supply Voltage Min:8V; Supply Voltage Max:35V; Controller Ic Case Style:Soic; No. Of Pins:16Pins; Frequency:500Khz; Operating Temperature Rohs Compliant: Yes |TEXAS INSTRUMENTS UC3525BDW
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