Offline UPS (Uninterruptable Power Supply)
详情介绍
Overview
With the increasing daily reliance on networked data systems, the need for failsafe backup of power supply systems is now essential. Uninterruptible power supply (UPS) technology, with a very high level of reliability are now extensively used to provide this backup security.
Renesas produces MCUs and highly efficient power semiconductor devices (IGBTs and MOSFETs) designed for full-digital control system that delivers uninterrupted CVCF (Constant Voltage and Constant Frequency) output made possible by continuous offline inverter. The key advantage of full-digital control for UPS systems is that all power conversion is handled by MCU, thus fewer total components are required comparing to a traditional analog system. This reduces overall cost and provides a more stable method of control.
UPS applications require a high-speed control MCU with multiple on-chip inverter and converter PWM control functions thus making the RL78/I1A an ideal choice for continuous commercial power supplies. Renesas delivers optimal solutions for UPS applications by providing a variety of semiconductor devices in addition to MCUs.
System Block Diagram
Recommended Products
| Block | Semiconductor device | Recommended products | Features, etc. |
|---|---|---|---|
| Controller | MCU | RL78/I1A | Optimal for standby(offline) power systems. Timers, 5V operation, small package. |
| R8C Family | Optimal for standby(offline) power systems. Timers, 5V operation, small package. | ||
| EEPROM | R1EX24xxx Series | I 2 C bus interface. Optimal for power failure recording *1 | |
| R1EX25xxx Series | SPI bus interface. Optimal for power failure recording *2 | ||
| Step-down circuit | MOSFET | RJK60xxDPK | Low on-resistance, high-speed switching |
| Step-up circuit | MOSFET | RJK1003DPN | Low on-resistance, high-speed switching |
| Inverter | MOSFET | RJK40/50/60xxDPK | Low on-resistance, high-speed switching |
| IGBT | RJH60DxDPP/DPK, RSH60FxDPK | low VCE(sat), FRD on-chip | |
| PFC power supply |
IGBT | RJH60DxDPP/DPK | low VCE(sat), FRD on-chip |
| PFC IC | R2A20115, R2A20112, R2A20117, R2A20118A, R2A20104 | ||
| Power supply, etc. | Photocoupler (standard) |
PS23xx Series PS27xx Series PS28xx Series |
High isolation voltage (5kVr.m.s.), 4p-LSOP, Ta=115°C High isolation voltage (3.75kVr.m.s.), 4p-SOP, Ta=110°C High isolation voltage (2.5kVr.m.s.), 4p-SSOP, Ta=110°C |
| Photocoupler (IGBT drive) |
PS93xx Series (6/8p-SDIP) PS94xx Series (16p-SOP) PS95xx Series (8p-DIP) PS99xx Series (8p-LSDIP) |
High isolation voltage (5kV～7.5kVr.m.s.) 0.6～2.5A output High CMR (CMR≧50kV/μs) |
|
| Op-amp | HA1630xxx series , μPC358 | ||
| MCU peripheral | Reset IC | RNA519xx Series | Variable detection voltage |
*1 I 2 C : Inter-Integrated Circuit
*2 SPI : Serial Peripheral Interface
Related Application Notes/Sample Code
| Title | Document No. |
|---|---|
| Power MOS FET application note | REJ05G0001-0200 |