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R2A20118ASP Schematic ( PDF Datasheet ) - Renesas Technology

Teilenummer R2A20118ASP
Beschreibung Critical Conduction Mode Interleaved PFC Control IC
Hersteller Renesas Technology
Logo Renesas Technology Logo 




Gesamt 10 Seiten
R2A20118ASP Datasheet, Funktion
Preliminary Datasheet
R2A20118ASP
R03DS0002EJ0100
Critical Conduction Mode Interleaved PFC Control IC
Rev.1.00
Jul 14, 2010
Description
The R2A20118A controls a boost converter to provide an active power factor correction.
The R2A20118A is based on R2A20117, and additional functions are OVP2 and Brownout.
The R2A20118A adopts critical conduction mode for power factor correction and realizes high efficiency and a low
switching noise by zero current switching.
Interleaving function improves ripple current on input or output capacitor by 180 degrees phase shift.
The feedback loop short detection, two modes overvoltage protection and OVP2, overcurrent protection, overcurrent
timer latch protection, and ZCD open detection are built in the R2A20118A, 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
VREF output voltage VREF: 5.0 V 1.5%
UVLO operation start voltage Vuvlh: 10.5 V 0.7 V
UVLO operation shutdown voltage Vuvll: 9.3 V 0.5 V
UVLO hysteresis voltage Hysuvl: 1.2 V 0.5 V
Functions
Boost converter control with critical conduction mode
Interleaving control
Brownout function
Two mode overvoltage protection and OVP2
Mode1: Dynamic OVP corresponding to a voltage rise by dynamic load change
Mode2: Static OVP corresponding to overvoltage in stable.
OVP2: OVP2 sense the PFC output voltage by independenced pin.
Feedback loop short detection
Slave ZCD signal open detection
RAMP charge current selectable function
Master and Slave independenced overcurrent protection
Overcurrent timer latch protection at abnormal operation
280 s restart timer
Soft start function for the reference voltage of Error Amp
Package: Pb-free SOP-20
Ordering Information
Part No.
Package Name
R2A20118ASPW0 FP-20DAV
Package Code
PRSP0020DD-B
Package
Abbreviation
SP
Taping Abbreviation (Quantity)
W (2,000 pcs/reel)
R03DS0002EJ0100 Rev.1.00
Jul 14, 2010
www.DataSheet.in
Page 1 of 9






R2A20118ASP Datasheet, Funktion
R2A20118ASP
Preliminary
Electrical Characteristics (cont.)
(Ta = 25°C, VCC = 12 V, RT = 33 k, BO = 5 V, OCP = TL = OVP2 = GND, CRAMP = 820 pF, FB = COMP,
RAMP-GAIN = OPEN)
Slave
control
Item
Phase delay
On time ratio
Symbol
Phase
Ton-ratio
Min Typ Max Unit
Test Conditions
160 180 200
deg *1, *2
0—5
% *1, *2
Gate drive Master gate drive rise time
tr-gdm
— 20 100 ns CL = 100 pF 90%
10%
tr
Slave gate drive rise time
tr-gds
— 20 100 ns CL = 100 pF 90%
10%
tr
Master gate drive fall time
tf-gdm
— 5 30 ns CL = 100 pF 90%
10%
tf
Slave gate drive fall time
tf-gds
— 5 30 ns CL = 100 pF 90%
10%
tf
Master gate drive low voltage
Vol1-gdm
— 0.02 0.1
V Isink = 2 mA
Master gate drive high voltage
Vol2-gdm
Voh-gdm
— 0.01
11.5 11.9
0.2
V Isink = 1 mA, VCC = 5 V
V Isource = –2 mA *1
Slave gate drive low voltage
Vol1-gds
— 0.02 0.1
V Isink = 2 mA
Slave gate drive high voltage
Vol2-gds
Voh-gds
— 0.01
11.5 11.9
0.2
V Isink = 1 mA, VCC = 5 V
V Isource = –2 mA *1
Over
current
protection
OCP threshold voltage
Vocp
0.27 0.30 0.33
V
Over
voltage
protection
Dynamic OVP threshold voltage Vdovp
Static OVP threshold voltage
Vsovp1
VFBVFBVFB
V COMP = 2.5 V
1.035 1.050 1.065
VFBVFBVFB
V COMP = 2.5 V
1.075 1.090 1.105
Static OVP hysteresis
Hys-sovp1
50 100 150 mV COMP = 2.5 V
FB Low detect threshold
voltage
Vfblow
0.45 0.50 0.55
V COMP = 2.5 V
FB Low detect hysteresis
Hysfblow
0.16 0.20 0.24
V COMP = 2.5 V
OVP2 threshold voltage
Vovp2
2.670 2.725 2.780
V Measured pin: OVP2
OVP2 pin input bias current
Iovp2
–0.5 –0.3 –0.1
A Measured pin: OVP2
OVP2 = 3 V *1
Notes: *1 Design spec.
*2
Tperiod (25 μs)
Ton-m (17 μs)
GD-M
GD-S
Tdelay
Phase =
Tdelay
Tperiod
× 360 [deg]
Ton-ratio =
1
Ton-s
Ton-m
× 100 [%]
Ton-s
R03DS0002EJ0100 Rev.1.00
Jul 14, 2010
www.DataSheet.in
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