LM2794/LM2795 Current Regulated Switched Capacitor LED Supply with Analog and PWM Brightness Control
The LM2794/LM2795 is a fractional CMOS charge‑pump LED driver that provides four regulated current sources. It operates from a 2.7 V to 5.5 V input and can drive up to 80 mA of load current for one to four white LEDs. Brightness can be adjusted either by an analog voltage on the BRGT pin or by a PWM signal on the SD pin.
The device is offered in standard and thin micro‑SMD‑14 packages, features a 325 kHz minimum switching frequency, and includes active‑low (LM2794) or active‑high (LM2795) shutdown inputs. Detailed electrical characteristics, ordering information, pin descriptions, and mechanical dimensions are provided.
| Input Voltage Range | 2.7 V to 5.5 V |
|---|---|
| Maximum Output Current | 80 mA |
| Switching Frequency (minimum) | 325 kHz |
| Shutdown Supply Current (typical) | 2.3 µA |
| Package Size (Standard Micro SMD‑14) | 2.08 mm × 2.403 mm × 0.845 mm |
It operates from 2.7 V to 5.5 V.
The typical shutdown current is 2.3 µA.
The device can supply up to 80 mA of LED current.