SI-8911L

qSI-8800L/8900L Series SI-8800L/8900L Series Separate Excitation Switching Type with Transformer sFeatures • • • • • • Integrated switching IC and transformer construction Requires only input/output and soft start capacitors as external components Low switching noise Heatsink not required Built-in overcurrent protection circuit (+5V) ± 2–output lineup (SI-8811L, SI-8911L) sApplications • Telephone power supplies • Onboard local power supplies sLineup Part Number VO(V) SI-8811L SI-8911L SI-8921L/8922L +5 +5 +5 Ch1 IO(A) 0.45 0.3 0.6 VO(V) –5 –5 Ch2 IO(A) 0.05 0.1 sAbsolute Maximum Rating Parameter DC Input Voltage Power Dissipation Junction Temperature Storage Temperature Symbol SI-8811L VIN PD Tj Tstg 35 1.15 1.3 +100 –25 to +85 Ratings SI-8911L SI-8921L 60 1.67 1.67 SI-8922L V W °C °C Unit sRecommended Operating Conditions Ratings Parameter DC Input Voltage Range Output Current Range 1 Output Current Range 2 Operating Temperature Range Symbol min. VIN IO1 IO2 Top 12 50 0 –10 SI-8811L typ. 20 250 –20 max. 30 450 –50*1 +70 min. 24 20 0 –10 SI-8911L typ. 40 150 –50 max. 55 300*2 –100 +60 –10 +65 –10 +65 min. 24 0 SI-8921L typ. 40 300 max. 55 600 min. 20 0 SI-8922L typ. 40 300 max. 55 600 V mA mA °C Unit *1: Output current 2 depends on the input/output conditions *2: If IO2=50mA or more, the condition IO1>0.5×IO2 is recommended. 102 qSI-8800L/8900L Series sElectrical Characteristics Ratings Parameter Symbol min. Output Voltage 1 Output Voltage 2 Efficiency Switching Frequency Switching Ripple Voltage 1 Switching Ripple Voltage 2 Operation Starting Voltage VO1 Conditions VO2 Conditions η Conditions f ∆Vr1 Conditions ∆Vr2 Conditions VSt Conditions 50 22 50 50 –4.75 –5.00 72 –5.25 4.75 SI-8811L typ. 5.00 max. 5.25 min. 4.75 –4.75 SI-8911L typ. 5.00 –5.00 65 68 50 50 24 22 24 17 20 60 max. 5.25 –5.25 72 68 50 80 80 60 72 68 50 80 80 min. 4.95 SI-8921L typ. 5.10 max. 5.20 min. 4.95 SI-8922L typ. 5.10 max. 5.20 (Ta=25°C) Unit V Recommended operating conditions Recommended operating conditions % kHZ mVp-p mVp-p V Recommended operating conditions (typ.) Recommended operating conditions (typ.) Recommended operating conditions (typ.) Recommended operating conditions (typ.) sOutline Drawing SI-8811L, 8911L, 8921L, 8922L o y (unit: mm) ±0.2 19 22 a b SK ±0.2 a. Part Number b. Lot Number Open Air Type Weight: Approx. 9.3g q 16.8 22 ±0.2 t ±0.2 Terminal 1 marking ,,,,,,,,,, ,,,,,,,,,,, 0.8max. (4×P3.175=12.7) 18 ±0.6 4 ±0.6 (16.5) 1 ±0.1 103 qSI-8800L/8900L Series sBlock Diagram SI-8811L VIN (+) 1 Tr1 Amp. Vref T1 GND 8 OSC VIN (–) 4 2 S.S 5 6 Start PWM Drive VO2 7 3 VO1 9 SI-8911L 9 VIN 1 3 Amp. Vref PWM Tr1 VO2 Start 2 S.S OCP 5 4 –Reg. 6 T1 GND 7 VO1 8 OSC Reg. Drive OCP SI-8921L/8922L 7 VIN 1 3 Amp. Vref OSC Start 2 S.S PWM Drive Tr1 GND 5 T1 VO 6 OCP sStandard External Circuit VIN (+) 1 + C1 C2 VIN (–) + 2 3 9 + VO1 C4 GND SI-8811L 8 + C5 VO2 4 7 + C3 C1(for smoothing VIN) C2(for soft start) C3(for smoothing VO2Reg input) C4(for smoothing VO1) C5(for smoothing VO2) : 35V/470µF : 16V/10µF : 10V/220µF : 16V/1200µF : 10V/47µF 5 6 C1,2,3,5 : Nippon Chemi-con SME Series or equivalent C4 : Nippon Chemi-con SXE Series or equivalent VIN 1 2 + C1 C2 C3 + + 9 3 SI-8911L 8 4 5 7 6 VO1 + + C4 GND C5 VO2 C1(for smoothing VIN) C2(for soft start) C3(for smoothing VO2Reg input) C4(for smoothing VO1) C5(for smoothing VO2) : 63V/220µF : 10V/33µF : 10V/220µF : 16V/1200µF : 10V/100µF GND C1,2,3,5 : Nippon Chemi-con SME Series or equivalent C4 : Nippon Chemi-con SXE Series or equivalent VIN 1 2 SI-8921L 7 + C1 C2 + 3 SI-8922L 6 4 5 + C3 VO C1(for smoothing VIN) C2(for soft start) C3(for smoothing VO2) C1,2 C3 : 63V/180µF : 10V/22µF : 10V/1200µF GND : Nippon Chemi-con SME Series or equivalent : Nippon Chemi-con SXE Series or equivalent GND 104 qSI-8800L/8900L Series sTa-PD Characteristics SI-8811L 1.5 1.5 SI-8921L 8922L SI-8911L PD=VO•IO 100 –1 ηχ Power Dissipation PD (W) Power Dissipation PD (W) 1.0 1.0 VO :Output voltage IO :Output current ηχ :Efficiency (%) The efficiency depends on the input voltage and the output current. Thus, obtain the value from the efficiency graph and substitute the percentage in the formula above. SI-8911L SI-8921L 8922L 75 0.5 0.5 0 0 Ambient Temperature Ta (°C) 25 50 75 100 0 0 Ambient Temperature Ta (°C) 25 50 100 sCaution 1. A low-impedance capacitor suitable for switching applications must be used for the external capacitor and must be connected as close to the IC as possible in order to assure low ripple voltage and stable switching operation. 2. The SI-881L/8911L series does not have a built-in overcurrent protection circuit on terminal VO2(–5V). Thus, avoid short-circuit conditions that may cause an overcurrent. 3. Do not connect VIN(–) of SI-8811L to GND. The overcurrent protection circuit may not work if they are connected. 4. Terminals left unconnected in the connection diagram must not be connected to other circuits. 5. The IC's metallic heatsink is electrically floating. Do not connect it to GND or any other circuit. 6. Since the SI-8800L and 8900L series have an open-package construction, they can be operated in specific environments. Verify the operating environment and use the IC within the conditions indicated in the reliability data. 105 qSI-8800L/8900L Series sTypical Characteristics (Ta=25°C) SI-8811L Rise Characteristics 6 6 SI-8911L Rise Characteristics 6 SI-8921L Rise Characteristics lO=0 0.6A VO2 (V) Output Voltage VO1 (V) VO2 (V) Output Voltage VO1 (V) 4 lO1=50mA lO2 =0mA lO1=250mA lO2 =–20mA lO1=450mA lO2 =–50mA VIN 20 (V) 4 5 Output Voltage VO (V) lO1 20 to 30mA 2 VIN 40 (V) 0.3A 4 2 0 0 3 2 4 6 8 10 12 14 16 18 5 10 15 20 25 30 35 –2 lO1=50mA lO2 =0mA lO1=250mA lO2 =–20mA lO1=450mA lO2 =–50mA –2 lO2 0 to 100mA –4 2 –4 1 –6 –6 Input Voltage VIN (V) Input Voltage VIN (V) 0 0 5 10 15 20 25 30 35 40 45 Input Voltage VIN (V) Efficiency Characteristics 80 VIN=12V 15V 20V 25V 30V Efficiency Characteristics 80 Efficiency Characteristics 80 70 VIN=55 V 75 70 55V VIN= Efficiency η (%) Efficiency η (%) 60 60 70 40 V 24 V Efficiency η (%) 48V 40V 30V 24V 50 40 30 50 65 40 60 IO2 = –50mA constant 0 0 50 100 150 200 250 300 350 400 450 500 30 IO2 = –100mA constant 0 0 50 100 150 200 250 300 350 400 20 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Output Current 1 lO1 (A) Output Current 1 lO1 (A) Output Current lO (A) SI-8922L Rise Characteristics 8 7 Output Voltage VO (V) 6 3 2 1 00 10 IO=0.4A 0.6A 4 0.5A 5 20 30 40 Input Voltage VIN (V) Efficiency Characteristics 80 VIN=55 V 70 60 50 40 30 20 00 Efficiency η (%) 48V 40V 30V 24V 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Output Current lO (A) 106