RicohメーカーRV5VHの使用説明書/サービス説明書
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APPLICA TION MANU AL DC/DC CONVER TER CONTR OLLER R V5VH SERIES NO . EA-049-9803 ELECTR ONIC DEVICES DIVISION.
NO TICE 1. The products and the product specifications described in this application manual are subject to change or discontinuation of production without notice for reasons such as improvement. Therefore, before deciding to use the products, please refer to Ricoh sales representatives for the latest information thereon.
RV5VH SERIES APPLICA TION MANU AL CONTENTS OUTLINE ...................................................................................................... 1 FEA TURES .....................................................................................
13) DC/DC2 F eed Back V oltage vs. T emperature ................................................... 30 14) EXT2 Output Current vs. T emperature ........................................................... 30 15) EXT2 Oscillator F requency vs. T emperature .
1 DC/DC CONVER TER CONTROLLER R V5VH SERIES OUTLINE The RV5VH series are dual output CMOS DC/DC converter ICs integrating Step-up and inverting DC/DC converters.
2 BLOCK DIA GRAM + – + – CSW V SEN V OUT1 L X1 D OUT FB EXT2 GND Vref Error Amp.1 Error Amp.2 1 2 3 4 8 7 6 5 VFM2 V LX lim. VFM1 OSC p_ shift + – DC/DC CONVER TER CONTROLLER (BOOST / INVER TING) R V5VH1 × × / RV5VH2 × × + – + – CSW V SEN V OUT1 EXT1 D OUT FB EXT2 GND Vref Error Amp.
3 R V5VH1 ×× /R V5VH2 ×× PIN CONFIGURA TION 1 2 3 4 8 7 6 5 • 8 pin SSOP (0.65mm pitch) PIN DESCRIPTION • RV5VH1 ×× Pin No. Symbol Description 1 CSW Control switch for DC/DC2 2 V SEN Sensing.
R V5VH1 ×× /R V5VH2 ×× 4 ABSOLUTE MAXIMUM RA TINGS • RV5VH1 ×× Symbol Item Ratings Unit V OUT1 V OUT1 Pin Voltage 12 V V LX1 L X1 Pin Voltage 12 V V SEN V SEN Pin Voltage 12 V D OUT D OUT Pin Voltage 12 V V CSW CSW Pin Voltage –0.3 to V OUT1 +0.
5 R V5VH1 ×× /R V5VH2 ×× ABSOLUTE MAXIMUM RATINGS Absolute Maximum ratings are threshold limit values that must not be exceeded even for an instant under any conditions.
R V5VH1 ×× /R V5VH2 ×× 6 ELECTRICAL CHARA CTERISTICS • RV5VH101 DC/DC Converter 1 * ) V IN =1.2V, I OUT =10mA, Topt=25˚C, unless otherwise specified. (See Typical Application) * 1 ) This value only shows the supply current of DC/DC1, not include the supply current of Voltage Detector and external resisto rs.
7 R V5VH1 ×× /R V5VH2 ×× DC/DC Converter 2 Symbol Item Conditions MIN. TYP. MAX. Unit V SET Set Output Voltage * 1 0 V V FB Feed Back Voltage –20 0 20 mV V IN Maximum Input Voltage 10 V V OPT min Minimum Operating Voltage I OUT =1mA 1.8 V I SS2 Supply Current2 CSW= “H” at No Load 10 µA Istandby Standby Current CSW=“L” 0.
R V5VH1 ×× /R V5VH2 ×× 8 Symbol Item Conditions MIN. TYP. MAX. Unit V DET Detector Threshold 2.633 2.700 2.767 V V HYS Detector Threshold Hysteresis 0.081 0.135 0.189 V I SS3 Supply Current3 1.2 µA V IN max Maximum Input Voltage 10 V V OPT min Minimum Operating Voltage 1.
9 R V5VH1 ×× /R V5VH2 ×× • RV5VH102 DC/DC Converter 1 * ) V IN =1.2V, I OUT =10mA, Topt=25˚C, unless otherwise specified. (See Typical Application) * 1 ) This value only shows the supply current of DC/DC1, not include the supply current of Voltage Detector and external resisto rs.
R V5VH1 ×× /R V5VH2 ×× 10 DC/DC Converter 2 V OUT1 =5.0V, Topt=25˚C Symbol Item Conditions MIN. TYP. MAX. Unit V SET Set Output Voltage * 1 –3.000 0 V V FB Feed Back Voltage 0 mV V IN Maximum Input Voltage 10 V V OPT min Minimum Operating Voltage I OUT =1mA 1.
11 R V5VH1 ×× /R V5VH2 ×× Voltage Detector V OUT1 =5.0V, Topt=25˚C Symbol Item Conditions MIN. TYP. MAX. Unit V DET Detector Threshold 4.388 4.500 4.612 V V HYS Detector Threshold Hysteresis 0.135 0.225 0.315 V I SS3 Supply Current3* 1 1.8 µA V IN max Maximum Input Voltage 10 V V OPT min Minimum Operating Voltage* 2 1.
R V5VH1 ×× /R V5VH2 ×× 12 Symbol Item Conditions MIN. TYP. MAX. Unit V OUT1 Step-up Output Voltage I OUT =0mA 2.925 3.000 3.075 V V IN max Maximum Input Voltage 10 V Vstart Oscillator Start-up Voltage No Load 0.7 0.8 V Vhold Hold-on Input Voltage I OUT =1mA 0.
13 R V5VH1 ×× /R V5VH2 ×× Symbol Item Conditions MIN. TYP. MAX. Unit V SET Output Voltage Setting Range * 1 0 V V FB Feed Back Voltage –20 0 20 mV V IN Maximum Input Voltage 10 V V OPT min Minimum Operating Voltage* 2 I OUT =1mA 1.8 V I SS2 Supply Current2* 3 CSW= “H” I OUT =0mA 10 µA Istandby Standby Current CSW=“L” 0.
R V5VH1 ×× /R V5VH2 ×× 14 Voltage Detector V OUT1 =3.0V, Topt=25˚C Symbol Item Conditions MIN. TYP. MAX. Unit V DET Detector Threshold 2.633 2.700 2.767 V V HYS Detector Threshold Hysteresis 0.081 0.135 0.189 V I SS3 Supply Current3* 1 1.2 µA V IN max Maximum Input Voltage 10 V V OPT min Minimum Operating Voltage* 2 1.
15 R V5VH1 ×× /R V5VH2 ×× • RV5VH202 DC/DC Converter 1 V OUT1 =5.0V, Topt=25˚C * ) V IN =3.0V, I OUT =10mA : unless otherwise specified. (See Typical Application) * 1 ) This value only shows the supply current of DC/DC1, does not include the supply current of Voltage Detector and external re sistors.
R V5VH1 ×× /R V5VH2 ×× 16 DC/DC Converter 2 * ) V OUT1 =5.0V, V OUT2 =–3.0V, I OUT2 =1mA : unless otherwise specified. (See Typical Application) * 1 ) Adjustable by external resistors to -30V. * 2 ) “Minimum Operating Voltage”means a voltage for the “V OUT1 ” pin.
17 R V5VH1 ×× /R V5VH2 ×× Voltage Detector V OUT1 =5.0V, Topt=25˚C * ) V OUT1 =5.0V : unless otherwise specified. (See Typical Application) * 1 ) This value only shows the supply current of voltage detector. * 2 ) “Minimum Operating Voltage”means a voltage for the “V OUT1 ” pin.
R V5VH1 ×× /R V5VH2 ×× 18 OPERA TION • DC/DC Converter 1 The DC/DC1 uses input voltage as an initial power supply, once boost operation is started the boost output will be used for the power supply of device itself.
19 R V5VH1 ×× /R V5VH2 ×× C1 L FB V OUT2 V OUT1 EXT2 + – RV5VH1 ×× /RV5VH2 ×× Error Amp.2 VFM2 CSW 6 1 7 S B D + PMOS OSC C2 R2 R1 The DC/DC2 can operate by a voltage of “V OUT1 ”. A change in the V OUT2 will feed back to the internal error amplifier through external voltage setting resistors.
R V5VH1 ×× /R V5VH2 ×× 20 V SEN D OUT RV5VH1 ×× /RV5VH2 ×× Pull-up Output Tr. – + Vref Ra Rb Rc Tr.1 2 8 The VD can operate by the voltage of “V OUT1 ”. The detector threshold and the reset voltage are internally adjusted by trimmed resistors and the VD monitors V SEN pin voltage.
21 R V5VH1 ×× /R V5VH2 ×× OPERA TION OF STEP-UP DC/DC CONVER TER Step-up DC/DC Converter charges energy in the inductor when Lx Transistor (LxTr) is on, and discharges the energy with the addition of the energy from Input Power Source thereto, so that a higher output voltage than the input voltage is obtained.
R V5VH1 ×× /R V5VH2 ×× 22 The above explanation is directed to the calculation in an ideal case where it is supposed that there is no energy loss in the external components and LxSW. In an actual case, the maximum output current will be 50 to 80% of the above calculated maximum output current.
23 R V5VH1 ×× /R V5VH2 ×× <Components> Coils L1 : 27µH, L2 : 220µH Diodes Schottky type Capacitors C1 : 47µF(tantalum type), C2 : 22µF(tantalum type) C3 : 0.01µF(ceramic type) C4 : 0.01µF(ceramic type) PMOS 2SJ238(TOSHIBA), etc. NPN Tr.
R V5VH1 ×× /R V5VH2 ×× 24 TEST CIRCUITS CSW D OUT FB EXT2 L1=100 µ H,220 µ H GND V SEN V OUT1 L X1 L1 V 22 µ F A Fig.1 Test Circuit 1 CSW D OUT FB EXT2 GND V SEN V OUT1 L X1 (EXT1) 100k Ω 150 Ω A V V 5 Ω (150 Ω ) Oscilloscope * EXT1 * Fig.
25 R V5VH1 ×× /R V5VH2 ×× Test Circuit 1: Typical Characteristics 1), 3), 5), 10), 11) Test Circuit 2: Typical Characteristics 6), 7), 8), 9), 13), 14), 15), 16), 17), 18), 19), 21) Test Circuit 3.
R V5VH1 ×× /R V5VH2 ×× 26 TYPICAL CHARA CTERISTICS • DC/DC Converter 1 1) Output Voltage vs. Output Current (RV5VH1 ×× ) RV5VH101 3.6 3.4 3.2 2.8 3.0 2.4 2.6 2.2 2.0 Output Current I OUT (mA) Output Voltage V OUT1 (V) 0 20 40 60 80 100 140 120 V IN =0.
27 R V5VH1 ×× /R V5VH2 ×× 3) Efficiency vs. Output Current (RV5VH1 ×× ) RV5VH101 100 75 80 85 90 95 65 70 55 60 50 Output Current I OUT (mA) Efficiency η (%) 0.01 0.1 1 10 100 Topt=25˚ C L1=100 µ H C1=22 µ F V IN =0.9V V IN =1.2V V IN =2.0V V IN =1.
R V5VH1 ×× /R V5VH2 ×× 28 5) DC/DC1 Output Voltage vs. Temperature RV5VH1 × × / 2 × × 3.3 3.0 3.2 3.1 2.9 2.8 2.7 Temperature Topt(˚ C) Output Voltage V OUT (V) –60 –40 –20 0 20 40 60 80 100 V IN =1.2V L1=100 µ H C1=22 µ F I OUT =10mA I OUT =5mA I OUT =0A RV5VH1 × × / 2 × × 5.
29 R V5VH1 ×× /R V5VH2 ×× 8) On Resistance of LX vs. Supply Voltage RV5VH1 × × 5.0 4.0 4.5 2.5 3.0 2.0 3.5 0.0 1.5 1.0 0.5 Supply Voltage V OUT1 (V) On Resistance Ron ( Ω ) 0.
R V5VH1 ×× /R V5VH2 ×× 30 12) Output Voltage vs. Output Current RV5VH101 0 –2 –4 –6 –14 –10 –12 –8 Output Current I OUT (mA) Output Voltage V OUT (V) 0 4 8 6 10 12 2 14 Topt=25˚ C V IN =1.2V V OUT1 =3V V SET –6V V SET –9V V SET –12V V SET –3V RV5VH1 × × / 2 × × 0.
31 R V5VH1 ×× /R V5VH2 ×× 15) EXT2 Oscillator Frequency vs. Temperature RV5VH1 × × / 2 × × 150 100 115 120 125 130 135 140 145 110 105 Temperature Topt(˚ C) Oscillator Frequency fosc(kH Z ) .
R V5VH1 ×× /R V5VH2 ×× 32 18) Detector Threshold Voltage vs. Temperature RV5VH1 × × / 2 × × 3.0 2.5 2.7 2.8 2.9 2.6 Temperature Topt(˚ C) Detector Threshold Voltage V DET (V) –60 –40 –20 0 20 40 60 80 100 +V DET –V DET RV5VH1 × × / 2 × × 5.
33 BLOCK DIA GRAM + – + – CSW FB1 V DD EXT1 D OUT FB2 EXT2 GND Vref Error Amp.1 Error Amp.2 1 2 3 4 8 7 6 5 VFM2 VFM1 OSC p_ shift + – DC/DC CONVER TER CONTROLLER (BOOST / INVER TING OUTPUT FOR LCD) R V5VH3 × × PIN CONFIGURA TION 1 2 3 4 8 7 6 5 • 8 pin SSOP (0.
R V5VH3 ×× 34 PIN DESCRIPTION ABSOLUTE MAXIMUM RATINGS Absolute Maximum ratings are threshold limit values that must not be exceeded even for an instant under any conditions. Moreover, such values for any two items must not be reached simultaneously.
35 R V5VH3 ×× Symbol Item Conditions MIN. TYP. MAX. Unit V SET1 Output Voltage Setting 1 2.05 * 1 V V FB1 Feed Back Volatage 1 1.950 2.000 2.050 V V IN max Maximum Input Voltage 10 V V OPT min Minimum Operating Voltage Specified as a V DD 1.8 V Voltage for Device Operation I SS11 Supply Current11* 2 CSW=“H”, FB1=1.
R V5VH3 ×× 36 DC/DC Converter 2 Symbol Item Conditions MIN. TYP. MAX. Unit V SET2 Output Voltage Setting 1 * 1 0 V V FB2 Feed Back Volatage 1 –20 0 20 mV V IN max Maximum Input Voltage 10 V V OPT min Minimum Operating Voltage Specified as the V DD 1.
37 R V5VH3 ×× Voltage Detector Symbol Item Conditions MIN. TYP. MAX. Unit V DET Detector Threshold 2.633 2.700 2.767 V V HYS Detector Threshold Hysteresis 0.081 0.135 0.189 V I SS3 Supply Current3* 1 1.2 µA V IN max Maximum Input Voltage 10 V V OPT min Minimum Operating Voltage Specified as the V DD 1.
R V5VH3 ×× 38 OPERA TION • DC/DC Converter 1 The DC/DC1 can operate by an input voltage to the V DD pin. A change in the V OUT1 will feed back to the internal error amplifier through external voltage setting resistors and internal feed back resistors.
39 R V5VH3 ×× • DC/DC Converter 2 The DC/DC2 can operate by an input voltage to the V DD pin. A change in the V OUT2 will feed back to the internal error amplifier through external voltage setting resistors. The V REF voltage should be provided from externally fixed power sup- ply such as V OUT1 .
R V5VH3 ×× 40 D OUT RV5VH3 ×× Pull-up Output Tr. – + Vref R1 R2 R3 Tr.1 3 8 V DD The Voltage Detector can operate by an input voltage to the V DD pin. The detector threshold and the reset voltage are internally adjusted by trimmed resistors and the VD monitors V DD pin voltage.
41 R V5VH3 ×× TYPICAL APPLICA TION 1 CSW FB1 V DD EXT1 D OUT FB2 EXT2 GND Output DC/DC 2 Output DC/DC 1 C2 L2 PMOS R3 R1 R2 C3 SBD C1 NPN Tr. SBD R6 R4 C4 R5 C5 L1 CoiI L1 : 100µH, L2 : 100µH Diode Schottky type capacitor C1 : 22µF(Ta), C2 : 22µF(Ta) C3 : 0.
R V5VH3 ×× 42 CSW FB1 V DD EXT1 D OUT FB2 EXT2 GND C2 L2 PMOS R3 R1 V IN R2 C3 SBD C1 NPN Tr. SBD R6 R4 C4 R5 C5 L1 Output DC/DC 2 Output DC/DC 1 TYPICAL APPLICA TION 2 CoiI L1 : 100µH, L2 : 100µH Diode Schottky type capacitor C1 : 22µF(Ta), C2 : 22µF(Ta) C3 : 0.
43 R V5VH3 ×× CSW FB1 V DD EXT1 D OUT FB2 EXT2 GND C2 L2 R3 R1 R2 C3 SBD3 C1 PNP Tr. SBD1 R6 R5 C5 L1 R4 C4 NMOS PMOS V IN SBD2 Output DC/DC 2 Output DC/DC 1 R1 : 820k Ω , R2 : 820k Ω , R3 : 100.
R V5VH3 ×× 44 TYPICAL CHARA CTERISTICS 1) Output Voltage vs. Output Current 25 15 10 5 –5 –15 –20 –10 20 0 –25 Output Current I OUT (mA) Output Voltage V OUT (V) 0 10 20 V IN =3.6V 100 90 80 70 60 50 40 30 20 Output Current I OUT (A) Efficiency η (%) 0.
45 R V5VH3 ×× SELECTION GUIDE The output voltage, the type of DC/DC1 and the taping type for the ICs can be selected at the user's request. The selection can be made by designating the part num.
R V5VH3 ×× 46 P A CKA GE DIMENSIONS (Unit : mm) T APING SPECIFICA TION (Unit : mm) • 8 pin SSOP (0.65mm pitch) 0.575 TYP. 3.1 ± 0.3 6.4 ± 0.3 4.4 ± 0.2 0.22 ± 0.1 0.5 ± 0.3 1.15 ± 0.1 0.1 ± 0.1 0.65 0.15 0.15 M 0.15 +0.1 –0.05 User Direction of Feed E1 E2 2.
47 R V5VH3 ×× APPLICATION HINTS When using these ICs, be sure to take care of the following points. • Set external components as close as possible to the IC and minimize the connection between the components and the IC. In particular, when an external component is connected to VOUT Pin, make minimum connection with the capacitor.
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Ricoh RV5VHをまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはRicoh RV5VHの技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Ricoh RV5VHの取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Ricoh RV5VHで得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Ricoh RV5VHを既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はRicoh RV5VHの不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Ricoh RV5VHに関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちRicoh RV5VHデバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
