R03DS0051EJ0100 Rev.1.00

Page 1 of 16

Aug 29, 2011

R2A20114AFP/ASP

Continuous Conduction Mode Interleaving

PFC Control IC

Description

R2A20114AFP/ASP is a boost converter control IC with PFC (Power Factor Correction). Employing continuous

conduction mode interleaving PFC, it performs higher efficiency and lower switching noise even for high power use.

Interleaving control of the boost converters, namely, producing 180 degrees phase shift between the output signals

(GD1,2) driving the boost converters, enables the system to perform high conversion efficiency and low switching

noises and, at the same time, to reduces ripple currents in input and output current and then this allows use of smaller

components such as boost inductors, input filters and output capacitors.

R2A20114AFP/ASP integrates a various kinds of protection circuits, such as the detection circuit of breaking of wire in

feedback loop, two modes of over voltage protection circuits, over current protection circuit and error output circuit (*

which improve the reliability of the power supply system and reduce the number of component parts on the system.

Features

 Maximum Ratings

 Supply voltage Vcc: 24 V

 Operating junction temperature Tjopr: from –40 to +150 degrees centigrade

 Electrical characteristics

 VFB feedback voltage VREF: 2.5 V  1.5%

 UVLO (Undervoltage Lockout) operation start voltage VH: 10.4 V  0.7 V

 UVLO operation shutdown voltage VL: 8.9 V  0.5 V

 UVLO hysteresis voltage Hysuvl : 1.5 V  0.5 V

 Functions

 Boost converter control with continuous conduction mode

 Interleaving control

 Brownout

 External clock synchronization input

 Two modes of over voltage protections

Mode 1: Dynamic OVP preventing over voltage after sudden variation of load.

Mode 2: Static OVP preventing over voltage in the period of normal operation.

 Feedback loop wire breaking/open detector

 Current balance control

 Phase 1 and Phase 2 independent over current protection

 Package line-up

Pb-free LQFP-40 (R2A20114AFP)

Pb-free SOP-20 (R2A20114ASP)

Notes: *1 Supported only by R2A20114AFP

*2 Frequency modulation periods (dfm) of R2A20114ASP are fixed.

R03DS0051EJ0100

Rev.1.00

Aug 29, 2011