SG3526中文资料

Device Operating Temperature Range Package ����� SEMICONDUCTOR TECHNICAL DATA PULSE WIDTH MODULATION CONTROL CIRCUIT ORDERING INFORMATION SG3526N TJ = 0° to +125°C Plastic DIP PIN CONNECTIONS Order this document by SG3526/D N SUFFIX PLASTIC PACKAGE CASE 707 18 1 (Top View) +Error Compensation CSoft–Start –CS +CS Shutdown –Error Reset RT RDeadtime Sync Output A Ground Output B VCC Vref VC CT 1 2 3 4 5 6 7 8 12 13 14 15 16 17 18 9 11 10 1MOTOROLA ANALOG IC DEVICE DATA ���� ����� ���������� ������� ��� ��� The SG3526 is a high performance pulse width modulator integrated circuit intended for fixed frequency switching regulators and other power control applications. Functions included in this IC are a temperature compensated voltage reference, sawtooth oscillator, error amplifier, pulse width modulator, pulse metering and steering logic, and two high current totem pole outputs ideally suited for driving the capacitance of power FETs at high speeds. Additional protective features include soft start and undervoltage lockout, digital current limiting, double pulse inhibit, adjustable dead time and a data latch for single pulse metering. All digital control ports are TTL and B–series CMOS compatible. Active low logic design allows easy wired–OR connections for maximum flexibility. The versatility of this device enables implementation in single–ended or push–pull switching regulators that are transformerless or transformer coupled. The SG3526 is specified over a junction temperature range of 0° to +125°C. • 8.0 V to 35 V Operation • 5.0 V ±1% Trimmed Reference • 1.0 Hz to 400 kHz Oscillator Range • Dual Source/Sink Current Outputs: ±100 mA • Digital Current Limiting • Programmable Dead Time • Undervoltage Lockout • Single Pulse Metering • Programmable Soft–Start • Wide Current Limit Common Mode Range • Guaranteed 6 Unit Synchronization Representative Block Diagram Vref VCC Ground Sync RDeadtime RT CT Reset CSoft–Start Compensation +Error –Error +C.S. –C.S. Shutdown 18 17 15 12 11 9 10 5 4 3 1 2 7 6 8 Reference Regulator Soft Start VCC Amp Under– Voltage Lockout Metering F/F Memory F/F Toggle F/F S D Q Q S R Q T Q Q 14 VC 13 Output A 16 Output B To Internal Circuitry Oscillator – – – + + +  Motorola, Inc. 1996 Rev 2 元器件交易网www.cecb2b.com SG3526 2 MOTOROLA ANALOG IC DEVICE DATA MAXIMUM RATINGS (Note 1) Rating Symbol Value Unit Supply Voltage VCC +40 Vdc Collector Supply Voltage VC +40 Vdc Logic Inputs –0.3 to +5.5 V Analog Inputs –0.3 to VCC V Output Current, Source or Sink IO ±200 mA Reference Load Current (VCC = 40 V, Note 2) Iref 50 mA Logic Sink Current 15 mA Power Dissipation TA = +25°C (Note 3) TC = +25°C (Note 4) PD 1000 3000 mW Thermal Resistance Junction–to–Air RθJA 100 °C/W Thermal Resistance Junction–to–Case RθJC 42 °C/W Operating Junction Temperature TJ +150 °C Storage Temperature Range Tstg –65 to +150 °C Lead Temperature (Soldering, 10 Seconds) TSolder ±300 °C NOTES: 1. Values beyond which damage may occur. 2. Maximum junction temperature must be observed. 3. Derate at 10 mW/°C for ambient temperatures above +50°C. 4. Derate at 24 mW/°C for case temperatures above +25°C. RECOMMENDED OPERATING CONDITIONS Characteristics Symbol Min Max Unit Supply Voltage VCC 8.0 35 Vdc Collector Supply Voltage VC 4.5 35 Vdc Output Sink/Source Current (Each Output) IO 0 ±100 mA Reference Load Current Iref 0 20 mA Oscillator Frequency Range fosc 0.001 400 kHz Oscillator Timing Resistor RT 2.0 150 kΩ Oscillator Timing Capacitor CT 0.001 20 µF Available Deadtime Range (40 kHz) – 3.0 50 % Operating Junction Temperature Range TJ 0 +125 °C 元器件交易网www.cecb2b.com SG3526 3MOTOROLA ANALOG IC DEVICE DATA ELECTRICAL CHARACTERISTICS (VCC = +15 Vdc, TJ = Tlow to Thigh [Note 5], unless otherwise noted.) Characteristics Symbol Min Typ Max Unit REFERENCE SECTION (Note 6) Reference Output Voltage (TJ = +25°C) Vref 4.90 5.00 5.10 V Line Regulation (+8.0 V ≤ VCC ≤ +35 V) Regline – 10 30 mV Load Regulation (0 mA ≤ IL ≤ 20 mA) Regload – 10 50 mV Temperature Stability ∆Vref/∆T – 10 – mV Total Reference Output Voltage Variation (+8.0 V ≤ VCC ≤ +35 V, 0 mA ≤ IL ≤ 20 mA) ∆Vref 4.85 5.00 5.15 V Short Circuit Current (Vref = 0 V) (Note 2) ISC 25 80 125 mA UNDERVOLTAGE LOCKOUT Reset Output Voltage (Vref = +3.8 V) – 0.2 0.4 V Reset Output Voltage (Vref = +4.8 V) 2.4 4.8 – V OSCILLATOR SECTION (Note 7) Initial Accuracy (TJ = +25°C) – ±3.0 ±8.0 % Frequency Stability over Power Supply Range (+8.0 V ≤ VCC ≤ +35 V) ∆fosc ∆ VCC – 0.5 1.0 % Frequency Stability over Temperature (∆TJ = Tlow to Thigh) ∆fosc ∆ TJ – 2.0 – % Minimum Frequency (RT = 150 kΩ, CT = 20 µF) fmin – 0.5 – Hz Maximum Frequency (RT = 2.0 kΩ, CT = 0.001 µF) fmax 400 – – kHz Sawtooth Peak Voltage (VCC = +35 V) Vosc(P) – 3.0 3.5 V Sawtooth Valley Voltage (VCC = +8.0 V) Vosc(V) 0.45 0.8 – V ERROR AMPLIFIER SECTION (Note 8) Input Offset Voltage (RS ≤ 2.0 kΩ) VIO – 2.0 10 mV Input Bias Current IIB – –350 –2000 nA Input Offset Current IIO – 35 200 nA DC Open Loop Gain (RL ≥ 10 MΩ) AVOL 60 72 – dB High Output Voltage (VPin 1–VPin 2 ≥ +150 mV, Isource = 100 µA) VOH 3.6 4.2 – V Low Output Voltage (VPin 2–VPin 1 ≥ +150 mV, Isink = 100 µA) VOL – 0.2 0.4 V Common Mode Rejection Ratio (RS ≤ 2.0 kΩ) CMRR 70 94 – dB Power Supply Rejection Ratio (+12 V ≤ VCC ≤ +18 V) PSRR 66 80 – dB NOTES: 2. Maximum junction temperature must be observed. 5. Tlow = 0°C Thigh = +125°C 6. IL = 0 mA unless otherwise noted. 7. fosc = 40 kHz (RT = 4.12 kΩ ± 1%, CT = 0.01 µF ± 1%, RD = 0 Ω) 8. 0 V ≤ VCM ≤ +5.2 V. 元器件交易网www.cecb2b.com SG3526 4 MOTOROLA ANALOG IC DEVICE DATA ELECTRICAL CHARACTERISTICS (continued) Characteristics Symbol Min Typ Max Unit PWM COMPARATOR SECTION (Note 7) Minimum Duty Cycle (VCompensation = +0.4 V) DCmin – – 0 % Maximum Duty Cycle (VCompensation = +3.6 V) DCmax 45 49 – % DIGITAL PORTS (SYNC, SHUTDOWN, RESET) Output Voltage (High Logic Level) (Isource = 40 µA) (Low Logic Level) (Isink = 3.6 mA) VOH VOL 2.4 – 4.0 0.2 – 0.4 V Input Current  High Logic Level (High Logic Level) (VIH = +2.4 V) (Low Logic Level) (VIL = +0.4 V) IIH IIL – – –125 –225 –200 –360 µA CURRENT LIMIT COMPARATOR SECTION (Note 9) Sense Voltage (RS ≤ 50 Ω) Vsense 80 100 120 mA Input Bias Current IIB  –3.0 –10 µA SOFT–START SECTION Error Clamp Voltage (Reset = +0.4 V) – 0.1 0.4 V CSoft–Start Charging Current (Reset = +2.4 V) ICS 50 100 150 µA OUTPUT DRIVERS (Each Output, VC = +15 Vdc, unless otherwise noted.) Output High Level Isource = 20 mA Isource = 100 mA VOH 12.5 12 13.5 13 – – V Output Low Level Isink = 20 mA Isink = 100 mA VOL – – 0.2 1.2 0.3 2.0 V Collector Leakage, VC = +40 V IC(leak) – 50 150 µA Rise Time (CL = 1000 pF) tr – 0.3 0.6 µs Fall Time (CL = 1000 pF) tf – 0.1 0.2 µs Supply Current (Shutdown = +0.4 V, VCC = +35 V, RT = 4.12 kΩ) ICC – 18 30 mA NOTES: 7. fosc = 40 kHz (RT = 4.12 kΩ ± 1%, CT = 0.01 µF ± 1%, RD = 0 Ω) 8. 0 V ≤ VCM ≤ +5.2 V 9. 0 V ≤ VCM ≤ +12 V 元器件交易网www.cecb2b.com SG3526 5MOTOROLA ANALOG IC DEVICE DATA Figure 1. Reference Stability over Temperature Figure 2. Reference Voltage as a Function Supply Voltage Figure 3. Error Amplifier Open Loop Frequency Response Figure 4. Current Limit Comparator Threshold Figure 5. Undervoltage Lockout Characteristic Figure 6. Output Driver Saturation Voltage as a Function of Sink Current –75 –50 –25 0 25 50 75 100 125 150 TJ, JUNCTION TEMPERATURE (°C) 50 mV Spec Limit 1.0 2.0 3.0 4.0 5.0 10 20 30 40 VCC, SUPPLY VOLTAGE (V) , RE FE RE NC E VO LT AG E (V) re f V 1 2 3 + _ 10 100 1.0 k 10 k 100 k 1.0 M 10 M 100 pF CComp f, FREQUENCY (Hz) , VO LT AG E GA IN (d B) Vo l A 25 50 75 100 125 150 175 200 DIFFERENTIAL INPUT VOLTAGE (mV) SH UT DO W N V OL TA GE (V ) 0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 Vref, REFERENCE VOLTAGE (V) RE SE T V OL TA GE (V ) 2.0 5.0 10 20 50 100 200 OUTPUT DRIVER SINK CURRENT (mA) , OU TP UT DR IV ER S AT UR AT IO N VO LT AG E (V) sa t V 5.0 4.0 3.0 2.0 1.0 80 60 40 20 0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0 2.5 2.0 1.5 1.0 0.5 0 元器件交易网www.cecb2b.com SG3526 6 MOTOROLA ANALOG IC DEVICE DATA R T Ω , TI MI NG R ES IS TO R (k ) Figure 7. VC Saturation Voltage as a Function of Sink Current Figure 8. Oscillator Period Figure 9. Error Amplifier Figure 10. Undervoltage Lockout Figure 11. Pulse Processing Logic The metering Flip–Flop is an asynchronous data latch which suppresses high frequency oscillations by allowing only one PWM pulse per oscillator cycle. The memory Flip–Flop prevents double pulsing in a push–pull configuration by remembering which output produced the last pulse. 2.0 5.0 10 20 50 100 200 IC, SINK CURRENT (mA) , SA TU RA TI ON V OL TA GE (V ) SA T V 0.0 02 0.0 05 0.0 1 0.0 2 0.0 5 0.1 0.2 0.5 1. 0 2.0 5.0 1 0 20 50 10 0 20 0 50 0 10 00 OSCILLATOR PERIOD (ms) RD = 0 Ω VCC Q6 Q5 Vref 125 µA Q3 Q4 50µA Q8 Q9 5001.0k Q2 1 + Error– Error Q10 3 Compensation Q12 Q11 Q7 50µA 14µA Q1 1.0k 500 100 µA 14µA 100µA 100µA Vref R1 1.2V Bandgap Reference R2 + – To Reset To Driver A To Driver B Metering F/F S D Q Q QR S Clock PWM PWM Sync Memory F/F 2.5 2.0 1.5 1.0 0.5 0 200 100 50 20 10 5.0 2.0 元器件交易网www.cecb2b.com SG3526 7MOTOROLA ANALOG IC DEVICE DATA Figure 12. Extending Reference Output Current Capability Figure 13. Error Amplifier Connections Figure 14. Oscillator Connections Figure 15. Foldback Current Limiting Figure 16. Soft–Start Circuity Figure 17. Driving VMOS Power FETs The totem pole output drivers of the SG3526 are ideally suited for driving the input capacitance of power FETs at high speeds. Reference Regulator 17 18 C* 27 VCC Gnd Vref + 10µF * May be required with some types of transistors 15 Gnd Vref R3 R2 1 2 R1 Positive Output Voltage Gnd Vref R2 R3 R1 1 2 Vout = Vref R1 + – + – Negative Output Voltage Vout = Vref R1 + R2 R3 = R1R2 11 RD 9 10 12SG3526 RT CT Sync + –Gnd 8 6 7 – R1 R2 RS Output Filter Vout I(max) = RS 0.1 V + Vout R1 + ISC = 0.1 V RS + Error Amp – – + PWM Ramp Vref 100 µA Q2 Q1 To Undervoltage Lockout CSoft–Start Q3 1 2 5 + Error – Error Reset +12V 14 13 16 VC A B Gnd SG3526 APPLICATIONS INFORMATION R1 + R2 R2 R2 R1 + R2 元器件交易网www.cecb2b.com SG3526 8 MOTOROLA ANALOG IC DEVICE DATA Figure 18. Half–Bridge Configuration Figure 19. Flyback Converter with Current Limiting Figure 20. Single–Ended Configuration Figure 21. Push–Pull Configuration +V Supply VC A B SG3526 Gnd 15 14 R1 13 16 Q2 Q1 T2 C2 T1 C1 In the above circuit, current limiting is accomplished by using the current limit comparator output to reset the soft–start capacitor. +V Supply R1 C1 15 R2 R3 13 16 7 6 5 8 4 D1 D2 14 C2 R4 T1 Q1 VC A B +CS –CSGndCS S R SG3526 To Output Filter Q1 R1 R2 14 13 16 VC A B SG3526 Gnd 15 +V Supply +V Supply R1 14 15 VC A B SG3526 Gnd 13 16 C1 R2 C2 R3 Q1 T1 Q2 元器件交易网www.cecb2b.com SG3526 9MOTOROLA ANALOG IC DEVICE DATA OUTLINE DIMENSIONS N SUFFIX PLASTIC PACKAGE CASE 707–02 ISSUE C NOTES: 1. POSITIONAL TOLERANCE OF LEADS (D), SHALL BE WITHIN 0.25 (0.010) AT MAXIMUM MATERIAL CONDITION, IN RELATION TO SEATING PLANE AND EACH OTHER. 2. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 3. DIMENSION B DOES NOT INCLUDE MOLD FLASH. 1 SEATING PLANE 10 9 18 M A B K C N F G D H J L DIM MIN MAX MIN MAX INCHESMILLIMETERS A 22.22 23.24 0.875 0.915 B 6.10 6.60 0.240 0.260 C 3.56 4.57 0.140 0.180 D 0.36 0.56 0.014 0.022 F 1.27 1.78 0.050 0.070 G 2.54 BSC 0.100 BSC H 1.02 1.52 0.040 0.060 J 0.20 0.30 0.008 0.012 K 2.92 3.43 0.115 0.135 L 7.62 BSC 0.300 BSC M 0 15 0 15 N 0.51 1.02 0.020 0.040 � � � � 元器件交易网www.cecb2b.com SG3526 10 MOTOROLA ANALOG IC DEVICE DATA Motorola reserves the right to make changes without further notice to any products herein. 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