Special Contents for Automotive Applications
The reason RICOH power management IC has been chosen for more than 20 years
Special Contents for IoT Devices
Ultra-low supply current / Low noise / Low electromotive force / Battery monitoring
Special Contents for Industrial Applications
Long term supply / Flexible quantity purchase / High quality and reliability
The R1700 is a zero-voltage switching (ZVS) PFC/LED driver controller with a variable output current/voltage. It is ideal for improving power factors of LED lightings and consumer appliances.
This device features the arbitrary setting of output voltage based on buck-boost (inverting) topology.
Integration of this device and the R1580 allows the two-stage architecture and a flicker-free operation in LED lighting applications.
|Input Voltage Range||8 V to 650 V|
|PWM Linear Dimming Control Range||5% to 100%|
|Built-in Features||- Max. 650-V Operating Regulator
- Half Bridge Gate Driver
|Corresponding Topologies||- Buck-boost (Inverting) PFC
- Variable Output Current PFC, Linear Dimmable
- Variable Output Voltage PFC
- Boost PFC
- Buck PFC
|Protection Features||- Overcurrent Protection (OCP)
- Thermal Shutdown (TSD)
- BST/VCC Pin Undervoltage Lockout (UVLO)
- VCC Pin Overvoltage Lockout (OVLO)
- Overvoltage Protection (FBOVP)
- Latch-type Protection (Selectable)
R1700 + R1580 Typical Application Circuit, Buck-boost (Inverting) Converter
The latch-type protection, the FB pin UVD function and the FB pin OVP voltage are user-selectable options.
|Product Name||Package||Quantity per Reel|
|#||Latch-type Protection||FB Pin UVD||FB Pin OVP Voltage|
|A||Yes||No||Typ. 1.2 V (Rising)|
|B||No||No||Typ. 1.2 V (Rising)|
|C||Yes||Yes||Typ. 3.65 V (Rising)|
|D||No||Yes||Typ. 3.65 V (Rising)|
Integration of R1700 and R1580
The integration of R1700 and R1580 allows a smaller flicker-free operation in LED lighting applications than a conventional two-stage architecture.