L6571A L6571B HIGH VOLTAGE HALF BRIDGE DRIVER WITH OSCILLATOR TECHNOLOGY: BCD ”OFF-LINE” FLOATING SUPPLY VOLTAGE UP TO 600V GND REFERRED SUPPLY VOLTAGE UP TO 18V DRIVER CURRENT CAPABILITY: - SINK CURRENT = 270mA - SOURCE CURRENT = 170mA VERY LOW START UP CURRENT: 150µA VERY LOW OPERATING CURRENT: <2mA UNDERVOLTAGE LOCKOUT PROGRAMMABLE OSCILLATOR FREQUENCY dV/dt IMMUNITY UP TO ± 50V/ns DESCRIPTION The device is a high voltage half bridge driver with built-in oscillator. The frequency of the oscillator can be programmed using external resistor Minidip SO8 ORDERING NUMBERS: L6571A L6571B L6571AD L6571BD and capacitor. The output drivers are designed to drive external n-channel power MOSFET and IGBT. The internal logic assures a minimum dead time to avoid cross-conduction of the power devices. BLOCK DIAGRAM H.V. RHV CVS VS BOOT BIAS REGULATOR HVG LEVEL SHIFTER HIGH SIDE DRIVER VS RF CBOOT BUFFER OUT RF CF LOAD COMP VS CF COMP LOGIC LOW SIDE DRIVER LVG GND D96IN433 June 2000 1/7 L6571A - L6571B ABSOLUTE MAXIMUM RATINGS Symbol (*) Parameter Value Unit Supply Current 25 mA VCF Oscillator Resistor Voltage 18 V VLVG Low Side Switch Gate Output V OUT High Side Switch Source Output VHVG High Side Switch Gate Output V BOOT Floating Supply Voltage VBOOT/OUT Floating Supply vs OUT Voltage 18 V dV BOOT/dt VBOOT Slew Rate (Repetitive) V/ns dV OUT/dt VOUT Slew Rate (Repetitive) ± 50 ± 50 IS 14.6 V -1 to VBOOT - 18 V -1 to VBOOT V 618 V V/ns Tstg Storage Temperature -40 to 150 °C Tj Junction Temperature -40 to 150 °C Ambient Temperature (Operative) -40 to 125 °C Tamb (*) The device has an internal zener clamp between GND and VS (typical 15.6V). Therefore the circuit should not be driven by a DC low impedance power source. Note: ESD immunity for pins 6, 7 and 8 is guaranteed up to 900 V (Human Body Model) THERMAL DATA Symbol Rth j-amb Parameter Thermal Resistance Junction-Ambient Max Minidip SO8 Unit 100 150 °C/W Min. Max. Unit 10 VCL V V RECOMMENDED OPERATING CONDITIONS Symbol VS Parameter Supply Voltage V BOOT Floating Supply Voltage - 500 V OUT High Side Switch Source Output -1 VBOOT -VCL V 200 kHz fout Oscillation Frequency PIN CONNECTION VS 1 8 BOOT RF 2 7 HVG CF 3 6 OUT GND 4 5 LVG D94IN059 2/7 L6571A - L6571B ELECTRICAL CHARACTERISTICS (VS = 12V; VBOOT - VOUT = 12V; Tj = 25°C; unless otherwise specified.) Symbol Pin VSUVP 1 Min. Typ. Max. Unit VS Turn On Threshold Parameter Test Condition 8.3 9 9.7 V VSUVN VS Turn Off Threshold 7.3 8 8.7 V VSUVH VS Hysteresis 0.7 1 1.3 V 14.6 VCL VS Clamping Voltage IS = 5mA 15.6 16.6 V ISU Start Up Current VS < VSUVN 150 250 µA 500 700 µA 5 µA 5 Quiescent Current VS > VSUVP IBOOTLK 8 Leakage Current BOOT pin vs GND VBOOT = 580V IOUTLK 6 Leakage Current OUT pin vs GND VOUT = 562V IHVG SO 7 High Side Driver Source Current VHVG = 6V 110 175 µA mA High Side Driver Sink Current VHVG = 6V 190 275 mA 5 Low Side Driver Source Current VLVG = 6V 110 175 mA Low Side Driver Sink Current VLVG = 6V 190 275 2 RF High Level Output Voltage IRF = 1mA VS -0.05 RF Low Level Output Voltage IRF = -1mA 3 CF Upper Threshold 7.7 7.95 8.2 V VCFL CF Lower Threshold 3.80 4.05 4.3 V td Internal Dead Time 0.85 0.50 1.25 0.72 1.65 0.94 µs µs DC Duty Cycle, Ratio Between Dead Time + Conduction Time of High Side and Low Side Drivers 0.45 0.5 0.55 1.2 1.5 mA 60 63 kHz Iq IHVG SI ILVG SO ILVG SI VRFON VRF OFF VCFU 50 L6571A L6571B IAVE 1 Average Current from Vs No Load, fs = 60KHz fout 6 Oscillation Frequency RT = 12k CT = 1nF OSCILLATOR FREQUENCY The frequency of the internal oscillator can be programmed using external resistor and capacitor. The nominal oscillator frequency can be calculated using the following equation: fOSC= 57 mA VS -0.2 V 200 mV 1 1 = 2⋅ RF ⋅ CF ⋅ In 2 1.3863 ⋅RF ⋅ CF where RF and CF are the external resistor and capacitor Figure 2: WAVEFORMS VS VSUVP VCF LVG T1 D96IN434 TC 3/7 L6571A - L6571B Figure 3: Typical Dead Time vs. Temperature Dependency (L6571A). Dead time [µsec] 1.7 D96IN378A Figure 4: Typical Frequency vs Temperature Dependency Frequency [KHz] 65 D96IN379A 64 1.6 63 1.5 62 1.4 61 1.3 60 59 1.2 58 1.1 57 1 56 55 0.9 -50 0 50 100 Temperature [C] 150 Figure 5: Typical and Theoretical Oscillator Frequency vs Resistor Value f (KHz) 150 D96IN380 Theoretical -50 -25 0 25 50 75 Temperature [C] 100 125 Figure 8: Typical Rise and Fall Times vs. Load Capacitance time [nsec] 300 D96IN417 250 100 90 80 Tr C=330pF C=560pF 70 200 C=1nF 60 150 50 Tf 100 30 50 20 0 0 5 6 7 8 9 10 15 20 30 Resistor Value (Kohm) 40 50 Figure 9: Quiescent Current vs. Supply Voltage. Iq (µA) D96IN418 104 103 102 10 0 4/7 2 4 6 8 10 12 14 V S(V) 1 2 3 4 5 6 C [nF] For both high and low side buffers @25°C Tamb L6571A - L6571B mm DIM. MIN. TYP. A a1 inch MAX. MIN. TYP. 1.75 0.1 0.25 a2 MAX. 0.069 0.004 0.010 1.65 0.065 a3 0.65 0.85 0.026 0.033 b 0.35 0.48 0.014 0.019 b1 0.19 0.25 0.007 0.010 C 0.25 0.5 0.010 0.020 c1 45° (typ.) D (1) 4.8 5.0 0.189 0.197 E 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 3.81 0.150 F (1) 3.8 4.0 0.15 0.157 L 0.4 1.27 0.016 0.050 M S OUTLINE AND MECHANICAL DATA 0.6 0.024 SO8 8 ° (max.) (1) D and F do not include mold flash or protrusions. Mold flash or potrusions shall not exceed 0.15mm (.006inch). 5/7 L6571A - L6571B mm DIM. MIN. A TYP. inch MAX. MIN. 3.32 TYP. MAX. 0.131 a1 0.51 B 1.15 1.65 0.045 0.065 b 0.356 0.55 0.014 0.022 b1 0.204 0.304 0.008 0.012 0.020 D E 10.92 7.95 9.75 0.430 0.313 0.384 e 2.54 0.100 e3 7.62 0.300 e4 7.62 0.300 F 6.6 0.260 I 5.08 0.200 L Z 6/7 3.18 OUTLINE AND MECHANICAL DATA 3.81 1.52 0.125 0.150 0.060 Minidip L6571A - L6571B Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. 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