High-Voltage PWM Power-Supply Controller
DescriptionThe MAX5003 high-voltage switching power-supply controller has all the features and building blocks needed for a cost-effective flyback and forward voltage-mode control converter. This device can be used to design both isolated and nonisolated power supplies with multiple output voltages that operate from a wide range of voltage sources. It includes a high-voltage internal start-up circuit that operates from a wide 11V to 110V input range. The MAX5003 drives an external N-channel power MOSFET and has a current-sense pin that detects overcurrent conditions and turns off the power switch when the current-limit threshold is exceeded. The choice of external power MOSFET and other external components determines output voltage and power.
The MAX5003 offers some distinctive advantages: soft-start, undervoltage lockout, external frequency synchronization, and fast input voltage feed-forward. The device is designed to operate at up to 300kHz switching frequency. This allows use of miniature magnetic components and low-profile capacitors. Undervoltage lockout, soft-start, switching frequency, maximum duty cycle, and overcurrent protection limit are all adjustable using a minimum number of external components. In systems with multiple controllers, the MAX5003 can be externally synchronized to operate from a common system clock.
Warning: The MAX5003 is designed to operate with high voltages. Exercise caution.
The MAX5003 is available in 16-pin SO and QSOP packages. An evaluation kit (MAX5003EVKIT) is also available.
- Wide Input Range: 11V to 110V
- Internal High-Voltage Startup Circuit
- Externally Adjustable Settings
- Output Switch Current Limit
- Oscillator Frequency
- Undervoltage Lockout
- Maximum Duty Cycle
- Low External Component Count
- External Frequency Synchronization
- Primary or Secondary Regulation
- Input Feed-Forward for Fast Line-Transient Response
- Precision ±2.5% Reference over Rated Temperature Range
- Thermal Shutdown
- +42V Automobile Systems
- High-Voltage Power Supply Modules
- Industrial Power Supplies
- ISDN Power Supplies
- Telecommunication Power Supplies
Technical DocumentsApp Note 3539 A 50 Watt Internal Bus Architecture (IBA) Power Supply
App Note 3363 New Ethernet Systems Distribute DC Power with Data
App Note 819 Isolated Power Supply Is Suitable For Telecom/Datacom Applications
Additional ResourcesDesign and simulate isolated power supplies with free MAX5003 Isolated Power Supply Design Software
Tools & Models
|Device||Fab Process||Technology||Sample size||Rejects||FIT at 25°C||FIT at 55°C||Material Composition|
|App Note||3539||A 50 Watt Internal Bus Architecture (IBA) Power Supply|
|App Note||3363||New Ethernet Systems Distribute DC Power with Data|
|App Note||819||Isolated Power Supply Is Suitable For Telecom/Datacom Applications|