MC33025: Up-to-1 MHz Dual Output (Push-pull or H-Bridge) Voltage-or-Current-Mode PWM Controller
The MC34025 series are high speed, fixed frequency, double-ended pulse width modulator controllers optimized for high frequency operation. 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 an oscillator, a temperature compensated reference, a wide bandwidth error amplifier, a high speed current sensing comparator, steering flip-flop, and dual high current totem pole outputs ideally suited for driving power MOSFETs. Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle-by-cycle current limiting, and a latch for single pulse metering. The flexibility of this series allows it to be easily configured for either current mode or voltage mode control.
Features- 50 ns Propagation Delay to Outputs
- Dual High Current Totem Pole Outputs
- Wide Bandwidth Error Amplifier
- Fully-Latched Logic with Double Pulse Suppression
- Latching PWM for Cycle-By-Cycle Current Limiting
- Soft-Start Control with Latched Overcurrent Reset
- Input Undervoltage Lockout with Hysteresis
- Low Start-Up Current (500 mA Typ)
- Internally Trimmed Reference with Undervoltage Lockout
- 45% Maximum Duty Cycle (Externally Adjustable)
- Precision Trimmed Oscillator
- Voltage or Current Mode Operation to 1.0 MHz
- Functionally Similar to the UC3825 Simplified
- Pb-Free Packages are Available
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Data Sheets (1)
Package Drawings (2)
| Document Title | Document ID/Size | Revision |
|---|
| PDIP-16 | 648-08 (34.2kB) | V |
| SO-16 WB | 751G-03 (56.7kB) | D |
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| MC33025DWG | Active, Not Rec | Pb-free
Halide free | SOIC-16W | 751G-03 | 3 | Tube | 47 | $2.4266 |
| MC33025DWR2G | Active | Pb-free
Halide free | SOIC-16W | 751G-03 | 3 | Tape and Reel | 1000 | $2.4266 |
| MC33025PG | Active | Pb-free
Halide free | PDIP-16 | 648-08 | NA | Tube | 25 | $2.4266 |
Specifications
| Product | Topology | Control Mode | fsw Typ (kHz) | Stand-by Mode | UVLO (V) | Short Circuit Protection | Latch | Soft Start | VCC Max (V) | Drive Cap. (mA) |
|---|
| MC33025DWR2G | Push-Pull | Current/Voltage Mode | 1000 | No | Yes | Yes | No | Yes | 30 | 200 / 200 |
| MC33025PG | Push-Pull | Current/Voltage Mode | 1000 | No | Yes | Yes | No | Yes | 30 | 200 / 200 |
