NCP5030: Buck-Boost Converter, Fixed Frequency, PWM, for LED Lighting
The NCP5030 is a fixed frequency PWM buck-boost converter optimized for constant current applications such as driving high-powered white LED. The buck-boost is implemented in an H-bridge topology and has an adaptive architecture where it operates in one of three modes: boost, buck-boost, or buck depending on the input and output voltage condition. This device has been designed with high-efficiency for use in portable applications and is capable of driving in DC up to 900 mA into a high power LED for flashlight / torch applications. To protect the device cycle-by-cycle current limiting and a thermal shutdown circuit have been incorporated as well as output over-voltage protection. The 700 kHz switching frequency allows the use of a low value 4.7 µH and ceramic capacitors.
Features- Efficiency: 87% at 500 mA and 3.3 V VIN
- Internal Synchronous Rectifier, No Schottky Diodes
- Adjustable Switching Limit Current to Optimize inductor size
- 0.3 µA Shut-down Control with True-Cut off
- Input Voltage Range from 2.7 V to 5.5 V
- 200 mV Feedback Voltage
- Output Over-voltage and Thermal Shut Down Protection
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Applications- LED Drive from Alkaline Batteries
| End Products |
Data Sheets (1)
Package Drawings (1)
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| NCP5030MTTXG | Active | Pb-free
Halide free | WDFN-12 | 506AY | 1 | Tape and Reel | 3000 | $1.1333 |
Specifications
| Product | Topology | VIN Min (V) | VIN Max (V) | VO Max (V) | IO Max (mA) | fSW Typ (kHz) |
|---|
| NCP5030MTTXG
Design it | Step-Up/Step-Down | 2.7 | 5.5 | 5.5 | 1200 | 700 |
