Preliminary
Datasheet
R2A20113ASP
Critical Conduction Mode PFC Control IC
Description
The R2A20113A controls a boost converter to provide an active power factor correction.
R03DS0026EJ0300
Rev.3.00
Nov 02, 2011
The R2A20113A adopts critical conduction mode for power factor correction and realizes high efficiency and a low
switching noise by zero current switching.
Because the zero current is detected by using the GND current, the ZCD Auxiliary winding is unnecessary.
The feedback loop open detection, two mode overvoltage protection, overcurrent protection are built in the R2A20113A,
and can constitute a power supply system of high reliability with few external parts.
Features
Absolute Maximum Ratings
Supply voltage Vcc: 24 V
Operating junction temperature Tjopr: –40 to +150°C
Electrical characteristics
UVLO operation start voltage VH: 12 V
0.8 V
UVLO operation shutdown voltage VL: 9.2 V
0.7 V
UVLO hysteresis voltage Hysuvl: 2.8 V
0.7 V
Functions
Boost converter control with critical conduction mode
Two mode overvoltage protection
Mode 1: Dynamic OVP corresponding to a voltage rise by load change
Mode 2: Static OVP corresponding to overvoltage in stable.
Feedback loop open detection
Overcurrent protection
Dynamic UVP corresponding to a voltage fall by load change
Off Time Control function (Frequency Limitter)
Package lineup: Pb-free SOP-8 (JEDEC)
Ordering Information
Part No.
R2A20113ASP#W5
—
Package Name
Package Code
PRSP0008DJ-A
SP
Package
Abbreviation
Taping Abbreviation
(Quantity)
W (2,500 pcs/reel)
R03DS0026EJ0300 Rev.3.00
Nov 02, 2011
Page 1 of 12
R2A20113ASP
Preliminary
Pin Arrangement
FB
COMP
RT
VREF
1
2
3
4
8
7
6
5
VCC
OUT
GND
CS
(Top view)
Pin Function
Pin No.
1
2
3
4
5
6
7
8
Pin Name
FB
COMP
RT
VREF
CS
GND
OUT
VCC
Function
Error amplifier input terminal
Error amplifier output terminal
A resistor connection terminal for RAMP current setting
Reference voltage output terminal
Zero current detection and overcurrent detection input terminal
Ground
Power MOSFET drive terminal
Supply voltage terminal
R03DS0026EJ0300 Rev.3.00
Nov 02, 2011
Page 2 of 12
R2A20113ASP
Preliminary
Absolute Maximum Ratings
(Ta = 25°C)
Item
Power Supply Voltage
OUT terminal peak current
OUT terminal DC current
COMP terminal current
RT terminal current
Vref terminal current
Vref terminal voltage
Vref terminal load capacitor
FB terminal voltage
CS terminal voltage
Power dissipation
Operating junction temperature
Storage temperature
Notes: 1.
2.
3.
4.
Symbol
VCC
Ipk-snk-out
Ipk-src-out
Idc-snk-out
Idc-src-out
Icomp
Irt
Iref
Vt-ref
Cref
Vt-fb
Vcs
Pt
Tj-opr
Tstg
Ratings
–0.3 to +24
0.9
–0.50
100
–50
+1
–1
–60 to –2
–5
–0.3 to Vref + 0.3
0.1 to 1
–0.3 to +5
–5 to +0.3
0.68
–40 to +150
–55 to +150
Unit
V
A
mA
mA
A
mA
V
F
V
V
W
°C
°C
Note
3
4
Rated voltages are with reference to the GND terminal.
For rated currents, inflow to the IC is indicated by (+), and outflow by (–).
Shows the transient current when driving a capacitive load.
In case of R2A20113ASP (SOP):
ja
= 120°C/W
This value is a thing mounting on 40
40
1.6 [mm], a glass epoxy board of wiring density 10%.
R03DS0026EJ0300 Rev.3.00
Nov 02, 2011
Page 4 of 12
R2A20113ASP
Preliminary
Electrical Characteristics
(Ta = 25°C, VCC = 12 V, CS = 0.1 V, FB = COMP, RRT = 200 k)
Item
Supply
UVLO turn-on threshold
UVLO turn-off threshold
UVLO hysteresis
Standby current
Operating current
VREF
Reference voltage
Line regulation
Load regulation
Temperature stability
OVP-VREF threshold voltage
Error
amplifier
Feedback voltage
Input bias current
Open loop gain
Upper clamp voltage
Low voltage
Source current
Sink current
Transconductance
RT
RAMP offset voltage
RAMP amplitude
RT voltage
Zero
current
detector
Restart
Off time
control
ZCD threshold voltage
Input bias current
Restart time delay
Minimum off time
Symbol
Vuvlh
Vuvll
Hysuvl
Istby
Icc
Vref
Vref-line
Vref-load
dVref
ovp-vref
Vfb
Ifb
Av
Vclamp-comp
Vl-comp
Isrc-comp
Isnk-comp
gm
Voff_ramp
dVramp
V-rt
Vzcd
Ics
Tstart
Toff-min
Min
11.2
8.5
2.1
—
—
4.945
—
—
—
Vref+
0.2
2.472
–0.40
—
3.65
—
–13.5
6
25
—
2.90
1.9
–4
–58
75
1.0
Typ
12
9.2
2.8
130
1.8
5.020
5
5
80
Vref+
0.4
2.510
–0.15
65
4.10
0.1
–10
10
46
1.0
3.1
2.0
0
–42
150
1.4
Max
12.8
9.9
3.5
250
2.6
5.095
20
20
—
Vref+
0.6
2.548
–0.05
—
4.3
0.3
–6
13.5
75
—
3.3
2.1
4
–25
330
1.8
Unit
V
V
V
A
mA
V
mV
mV
ppm/°C
V
V
A
dB
V
V
A
A
s
V
V
V
mV
A
s
s
Vcs = 0 V
FB = 2.0 V, COMP = 2.5 V
FB-COMP short
Measured pin: FB
*
1
Test Conditions
VCC = Vuvlh – 0.2 V
Isource = 0 mA
Isource = 0 mA
Vcc = 10 V to 24 V
Isource = 0 mA to –5 mA
Ta = –40 to +125°C
*
1
FB = 2.0 V
COMP: Open
FB = 3.0 V
COMP: Open
FB = 1 V
COMP = 2.5 V
FB = 3.5 V
COMP = 2.5 V
FB = 2.45V
2.55 V
COMP = 2.5 V
*
*
1
2
Notes:
*1
Design spec
*2
dVramp = Vclamp_comp – Voff_ramp
R03DS0026EJ0300 Rev.3.00
Nov 02, 2011
Page 5 of 12
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