Ricoh Electronic Devices Co., Ltd. launched R1700 series, a zero-voltage switching (ZVS) PFC/LED driver controller with a variable output current/voltage. The R1700 is a multi-purpose PFC controller equipped with various functions and characteristics. This device is capable of setting output voltage/current by inputting PWM signals, which make this device suitable to be used as a variable voltage PFC controller or a variable voltage LED driver controller with PFC.
The R1700 features edge resonant control of zero-voltage switching (ZVS) that helps to reduce switching loss and electromagnetic interference (EMI) and realizes a power factor correction (PFC) circuit. This device is adopting a synchronous rectification ZVS, which significantly improves efficiency in the device operation with the wide input/output voltage range. This device is designed for high switching frequency operation that allows the thinning/downsizing of the peripheral components and power supply systems.
Integration of this device and the R1580 series, constant-current LED driver controller, forms the two-stage linear dimmable LED driver which realizes flicker-free/low EMI operation. This two-stage architecture enables photographing of a clear image without being affected by LED flickers or noise issues.
R1700 (SSOP-16 Package)
Features
| Input Voltage Range | 8 V to 650 V |
|---|---|
| Operating Temperature Range | -40℃ to 85℃ |
| PWM Linear Dimming Control Range | 5% to 100% |
| Protection Function | Over Current Protection (OCP) Thermal Shut Down Protection (TSD) BST/VCC pin Under Voltage Lock Out (UVLO) VCC pin Over Voltage Lock Out (OVLO) Over Voltage Protection (FBOVP) Latch-type Protection |
| Corresponding Topologies | Buck-boost (Inverting) PFC Variable Output Current PFC, Linear Dimming Variable Output Voltage PFC Boost PFC Buck PFC |
| Package | SSOP-16 |