r2a20111 Renesas Electronics Corporation., r2a20111 Datasheet
r2a20111
Available stocks
Related parts for r2a20111
r2a20111 Summary of contents
Page 1
... R2A20111SP/DD Power Factor Correction Controller IC Description The R2A20111 is a power-factor correction (PFC) controller IC. This IC adopts continuous conduction mode as PFC operation. Various functions such as constant power limit, overvoltage detection, overcurrent detection, soft start, feedback-loop disconnection detection, and holding function of PFC operation through momentary outage (PFC hold function) are incorporated in a single chip ...
Page 2
... R2A20111SP/DD Ordering Information Part No. Package Name R2A20111SPW0 FP-16DAV R2A20111DDU0 DP-16FV System Diagram 150 H Rec Rec– (450V) From OUT VREF RT 62k 390p CAO VREF 6800p 2.2k 7 470p Imo = K {IAC IAC 82k IAC 12 IMO 1.28M 1000p K CAI 5 2.4k VREF 22k 100 CLIMIT ...
Page 3
... R2A20111SP/DD Pin Arrangement DELAY CGND CLIMIT Pin Description Pin No. Pin Name I/O 1 OUT Output Power MOS FET gate driver output 2 GND — Ground 3 DELAY Input/Output Hold time adjust and IC shutdown 4 CGND Input Non-inverting input of current amplifier 5 CAI Input/Output Inverting input of current amplifier and Current output for PFC control ...
Page 4
... R2A20111SP/DD (1) Setting the PFC function hold time for momentary outage When the PFC-ON pin is driven below 0.79 V (typ.) due to a momentary outage, the delay pin functions as source current. PFC operation continues until the capacitor is charged to 1.2 V (typ.). After the voltage on the delay pin reaches 1 ...
Page 5
... R2A20111SP/DD EO Pin: This pin is the output of the voltage amplifier. This pin is connected to the phase-compensation circuit of the voltage amplifier. SS Pin: This pin is connected to GND or VREF via a capacitor. This pin is pulled up to the voltage on the VREF pin until PFC operation starts. When the voltage on the PFC-ON pin has reached 0.82 V (typ.), PFC operation starts and this pin flows 25 PA source current ...
Page 6
... R2A20111SP/DD Absolute Maximum Ratings Item Supply voltage VCC OUT peak current Ipk-out OUT DC current Idc-out Terminal voltage Vi-group1 Vi-group2 CAO voltage Vcao EO voltage Veo DELAY voltage Vdelay CAI voltage Vi-cs RT current Irt IAC current Iiac VREF current Io-ref Power dissipation Pt Operating junction temperature ...
Page 7
... R2A20111SP/DD Electrical Characteristics Item Symbol Supply Start threshold VH Shutdown threshold VL UVLO hysteresis dVUVL Startup current Is Is temperature dIs/dTa stability Operating current Icc VREF Output voltage Vref Line regulation Vref-line Load regulation Vref-load Temperature dVref stability Oscillator Initial accuracy fout fout temperature ...
Page 8
... R2A20111SP/DD Electrical Characteristics (cont.) Item Symbol C Input offset voltage Vio-ca AMP Open loop gain Av-ca High voltage Vcaoh Low voltage Vcaol Source current Isrc-ca Sink current Isnk-ca Transconductance Gm-c IAC/ IAC pin voltage Viac Multiplier Imo current 1 Imo1 Imo current 2 Imo2 Imo current 3 ...
Page 9
... R2A20111SP/DD Electrical Characteristics (cont.) Item Symbol Supervisor PFC enable voltage Von-pfc PFC disable voltage Voff-pfc PFC disable delay Vd-pfc threshold voltage Input current Ipfc-on B+ OVP set voltage dVovps dVovpr B+ OVP reset voltage FB low set voltage Vfbls DELAY source Isrc-delay current DELAY sink current Isnk-delay 1. dVovps = Vovps – ...
Page 10
... R2A20111SP/DD Timing Chart 1. Startup and Stop Timing VCC 10.5V (VH) 5V 4.0V VREF VREF GOOD (Internal signal) PFC-ON 0.82V (Von-pfc) PFC-OFF (Internal signal) SS CAO Soft start CAO CT OUT FB REJ03F0231-0100 Rev.1.00 Mar 28, 2007 Page 9.0V (VL) CAO SS ...
Page 11
... R2A20111SP/DD 2. Stop Timing by PFC-ON Pin PFC-ON DELAY PFC-OFF ( Internal signal ) SS OUT FB REJ03F0231-0100 Rev.1.00 Mar 28, 2007 Page 0.79V (Voff-pfc) 1.2V(Vd-pfc) td-pfcoff PFC hold time Normal control ...
Page 12
... R2A20111SP/DD 3. Oscillator, Gate Drive Output CT CAO Dead Time (Internal signal) OUT ( ) Leading edge control 4. PFC Operation On/Off PFC-ON PFC-OFF ( Internal signal ) DELAY OUT REJ03F0231-0100 Rev.1.00 Mar 28, 2007 Page 0.82V(Von-pfc) 0.79V(Von-pfc) 1.2V(Vd-pfc) ...
Page 13
... R2A20111SP/ Supervisor FB B+OVP ( Internal signal ) FB LOW ( Internal signal ) SS OUT REJ03F0231-0100 Rev.1.00 Mar 28, 2007 Page Vovps Vovpr 0.52V(FB LOW) ...
Page 14
... R2A20111SP/DD Description of Functions 1. UVL Circuit The UVL circuit monitors the Vcc voltage. When the voltage is lower than 9.0 V, the IC is stopped. When the voltage is higher than 10.5 V, the IC is started. When operation of the IC is stopped by the UVL circuit, the driver circuit output is fixed low, and output of VREF and the oscillator are stopped ...
Page 15
... R2A20111SP/DD 2. Operating Frequency The R2A20111 operating frequency fosc is determined by adjusting the timing resistor Rt (the RT pin, pin 9) and the timing capacitance Ct (the CT pin, pin 10). The operating frequency is approximated by the following expression: 6 1.755 10 fosc = (kHz (pF Make sure to use more resistance because of the maximum rating of the RT-pin. Meanwhile, as the resistance increases, the IC will become more susceptible to noise, etc ...
Page 16
... R2A20111SP/DD 3. Soft Start This function gradually increases the pulse width of the OUT pin from a 0% duty cycle at the startup. By preventing a sudden increase of the pulse width, potential problems such as transient stress on the external parts, overshoot of the PFC output voltage (B+ voltage), or coil noise generated due to overcurrent will be prevented. Although the duty cycle is controlled by the CAO signal, operation of the CAO pin is affected by the voltage on the SS pin during the soft start ...
Page 17
... R2A20111SP/DD 4. PFC-ON Pin Function The PFC-ON pin is applied smoothing voltage of rectified AC voltage. Accordingly, the AC voltage state is detected and each function depending on the power-supply state is operated. Details of their operation are given below. Note, however, that the functions do not operate when VREF voltage is lower than UVL operation and shutdown state. ...
Page 18
... R2A20111SP/DD 4-2. Multiplier Gain Switching Multiplier gain is switched according to the input AC voltage. 4-3. Operation on a Momentary Outage (PFC operation hold on momentary outage: PFC hold function) (1) When the Momentary Outage is Short During a momentary outage, the voltage on the PFC-ON pin is discharged. When it reaches 0.79 V, charging of the capacitor on the DELAY pin starts. When AC-voltage input is resumed, and the voltage on the DELAY pin doesn’ ...
Page 19
... R2A20111SP/DD (2) When the Momentary Outage is Long When the momentary outage is long enough that the DELAY pin voltage reaches 1.2 V, OUT is stopped and SS is reset, then PFC operation is stopped. The current on the PFC-ON pin switches from source current to sink current and the voltage on the PFC-ON pin falls. When the supply of AC voltage resumes, the IC is restarted in a soft-start operation ...
Page 20
... R2A20111SP/ Pin Function The FB pin is a feedback input for the PFC output voltage. This pin is applied to voltage divided PFC output with resistors. The PFC output voltage is controlled so that the voltage on FB becomes 2.5 V. The FB pin function provides protection against abnormal PFC output voltages. The protective functions include overvoltage detection and low- voltage detection ...
Page 21
... R2A20111SP/DD 5-1. Power-Supply Startup Operation When the AC voltage is applied, the PFC-ON pin voltage starts to rise up. After it has reached 0.82 V, the voltage on the SS pin starts to be discharged and PFC operation is started with the soft-start function. Once the PFC operation is started, the voltage on the FB pin rises and is controlled so that it reaches 2.5 V. ...
Page 22
... R2A20111SP/DD 5-3. Overvoltage Operation When the PFC output voltage is larger than 7.5% of the prescribed voltage due to an abnormality in the system or a sudden change of AC voltage or load, operation of the OUT pin is stopped. When the PFC output voltage returns to within 5.5% of the prescribed voltage, operation of the OUT pin is resumed. ...
Page 23
... R2A20111SP/ Shutdown Function When the DELAY pin is pulled the IC shutdown function operates. During shutdown, the IC enters the standby state. To reset the circuit from the shutdown state, the voltage on VCC must be lowered less. After this reset, when the VCC pin voltage reaches 10.5 V, the IC is restarted. ...
Page 24
... R2A20111SP/DD Main Characteristics Standby Current vs. Power Supply Voltage Characteristics 250 Ta = 25°C 200 150 100 Power Dissipation vs. Power Supply Voltage Characteristics 25°C 7 1000pF 7 6.5 6 5.5 5 4 REJ03F0231-0100 Rev.1.00 Mar 28, 2007 Page Vcc ( ...
Page 25
... R2A20111SP/DD 5.2 Vcc = 12V 5.15 Iref = –1mA 5.1 5.05 5 4.95 4.9 4.85 4.8 –40 –20 75 Vcc = 12V 73 RT= 27k CT = 1000pF –40 –20 0 REJ03F0231-0100 Rev.1.00 Mar 28, 2007 Page Reference Voltage Temperature Characteristics (°C) Operating Frequency Temperature Characteristics (°C) 80 100 120 80 100 ...
Page 26
... R2A20111SP/DD 11.5 11.3 11.1 10.9 10.7 10.5 10.3 10.1 9.9 9.7 9.5 –40 –20 0 9.6 9.4 9.2 9 8.8 8.6 8.4 –40 –20 0 REJ03F0231-0100 Rev.1.00 Mar 28, 2007 Page Start-up Voltage Temperature Characteristics (°C) Shutdown Voltage Temperature Characteristics (°C) 80 100 120 80 100 120 ...
Page 27
... R2A20111SP/DD 280 Vcc = 9.5V 260 240 220 200 180 160 140 120 –40 – Vcc = 12V 6 0pF 6 5.5 5 4.5 4 3.5 3 –40 –20 0 REJ03F0231-0100 Rev.1.00 Mar 28, 2007 Page Standby Current Temperature Characteristics (°C) Operating Current Temperature Characteristics (°C) ...
Page 28
... R2A20111SP/DD CAI Pin Current vs. IAC Pin Current Characteristics 250 Ta = 25°C Vcc = 12V Veo = Veoh RT = 27k 200 PFC-ON = 0.5V PFC- 150 100 100 REJ03F0231-0100 Rev.1.00 Mar 28, 2007 Page PFC- PFC- PFC- 200 300 400 IAC Pin Current ( A) PFC- 500 600 ...
Page 29
... Figure 13 Template Illustrating Symbols of External Circuit Elements REJ03F0231-0100 Rev.1.00 Mar 28, 2007 Page Vout Imo Rfb1 Rfb2 AC_Rectifier Ceo1 Reo2 Reo1 Rpfc1 Ceo2 Rac Css R2A20111 1000p Cdelay Rref-cai Rmo Rmo Rcs Cpfc Rpfc2 ...
Page 30
... R2A20111SP/DD 1. Power Limit Function 1-1. Limited Power Value When the load exceeds the rated load, the power is limited by the set power value and the IC enters the constant power control state. This indicates that the power is limited by nearly-constant power independent of the input AC voltage, compared to the conventional overcurrent detection circuit ...
Page 31
... R2A20111SP/DD 1-5. Relations between RT Resistor and Power Limit The maximum current on the CAI pin is expressed in inverse proportion to the resistance of the RT pin as 4.7/RT. Since Imo is proportional to the input AC current, when the value of AC voltage drops, Imo rises. Imo is, however, limited by the above maximum current value. If the value of Imo (max.) is set higher than the required current value with the minimum input AC voltage, the power limit function is operated in all range of input AC voltage without any difficulty ...
Page 32
... R2A20111SP/DD 1-6. Tolerance of Limited Power Values The tolerance of the limited power values depend on the tolerance of the CAI pin current. Since overcurrent detection value is constant, set the RT resistance as illustrated in figure 17, so that the resistance does not exceed the overcurrent detection level. Seen in figure 17, the key to select a switching device is not the tolerance in the limited power value but in the current value limited by RT. The tolerance of this current ranges from – ...
Page 33
... R2A20111SP/DD 2. Operation of PFC On/Off Function PFC function of the R2A20111 can be turned on and off externally using the following methods. (1) Pull down the voltage on the PFC-ON pin to the GND level. (2) Pull up the voltage on the SS pin to the VREF voltage level. (3) Pull down the voltage on the CLIMIT pin to 1 lower. ...
Page 34
... R2A20111SP/DD 2-2. On/Off Operation by Using the SS Pin When the voltage on the SS pin is pulled up to the VREF voltage level, the voltage level of the CAO pin is also pulled up together with the SS pin. Then, the OUT pin is stopped. After the voltage level of the SS pin is pulled up, a few pulses on the OUT pin may be generated by capacitance of the phase-compensation circuit of the CAO pin (see figure 19) ...
Page 35
... R2A20111SP/DD 3. Overcurrent Detection Circuit When the RC filter is added the CLIMIT pin to prevent noise errors (see figure 21), the cut-off frequency shifts on the lower frequency side than the added RC filter because of the Rclimit 1 and Rclimit 2. This causes possibility that exactly current can not detect. ...
Page 36
... R2A20111SP/DD 4. PFC Hold Function The PFC hold time can be adjusted by changing the value of the capacitor connected to the DELAY pin. The capacitance is charged with the source current from the IC and the PFC hold function is operated until the voltage on the DELAY pin reaches 1.2 V. Although the PFC-ON pin detects an occurrence of the momentary outage, the detection delay time occurs because a smoothing capacitor is connected to the PFC-ON pin ...
Page 37
... R2A20111SP/DD 5. Precautions on Pins 5-1. OUT Pin Undershoot may occur on the PWM pulse of the OUT pin because of a parasitic inductance of wiring, etc. This undershoot (negative electric potential) may cause errors of the IC. In such a case, use a Schottky barrier diode, etc. to suppress the undershoot. 5-2. DELAY Pin When the voltage on the DELAY pin reaches more, the shutdown function is operated and the IC enters the shutdown state ...
Page 38
... Place the capacitor (Css) for SS as close to the IC as possible. 12V REJ03F0231-0100 Rev.1.00 Mar 28, 2007 Page Vout Rfb1 Rfb2 AC_Rectifier Ceo1 Cpfc Reo2 Reo1 Rpfc1 Rpfc2 Ceo2 Ct Rac Css R2A20111 Ccao1 1000p Ccao2 Cdelay Rcao2 Rcao1 Rclimit1 0.1 Rmo Rmo Rclimit2 Rcs Rt ...
Page 39
... R2A20111SP/DD (6) There is a potential that placing the heat sink between ICs and power MOSFET will be a some kind of shield and reduce the radiation noise (figure 25). IC Figure 25 Example of Layout of Parts REJ03F0231-0100 Rev.1.00 Mar 28, 2007 Page Heat Heat E E sink ...
Page 40
... R2A20111SP/DD Package Dimensions JEITA Package Code RENESAS Code P-SOP16-5.5x10.06-1.27 PRSP0016DH Index mark JEITA Package Code RENESAS Code P-DIP16-6.3x19.2-2.54 PRDP0016AE 0. REJ03F0231-0100 Rev.1.00 Mar 28, 2007 Page Previous Code MASS[Typ.] FP-16DAV 0.24g F 9 Terminal cross section ( Ni/Pd/Au plating ) ...
Page 41
Sales Strategic Planning Div. Notes: 1. This document is provided for reference purposes only so that Renesas customers may select the appropriate Renesas products for their use. Renesas neither makes warranties or representations with respect to the accuracy or completeness ...