L6571 High voltage half bridge driver with oscillator Features ■ High voltage rail up to 600 V ■ BCD off line technology ■ 15.6 V Zener clamp on Vs ■ Driver current capability: DIP-8 SO8 – Sink current = 270 mA can be programmed using external resistor and – Source current = 170 mA capacitor. ■ Very low start up current: 150 mA The internal circuitry of the device allows it to be ■ Undervoltage lockout with hysteresis driven also by external logic signal. ■ Programmable oscillator frequency The output drivers are designed to drive external ■ Dead time 1.25 μs (L6571A) or 0.72 μs nchannel power MOSFET and IGBT. The internal (L6571B) logic assures a dead time to avoid cross- ■ dV/dt immunity up to ±50 V/ns conduction of the power devices. ■ ESD protection Two version are available: L6571A and L6571B. They differ in the internal dead time: 1.25μs and Description 0.72 μs (typ.) The device is a high voltage half bridge driver with built in oscillator. The frequency of the oscillator Figure 1. Block diagram (cid:43)(cid:17)(cid:57)(cid:17) (cid:38)(cid:57)(cid:54) (cid:53)(cid:43)(cid:57) (cid:57)(cid:54) (cid:37)(cid:50)(cid:50)(cid:55) (cid:20) (cid:27) (cid:37)(cid:44)(cid:36)(cid:54) (cid:47)(cid:40)(cid:57)(cid:40)(cid:47) (cid:26) (cid:43)(cid:57)(cid:42) (cid:38)(cid:37)(cid:50)(cid:50)(cid:55) (cid:53)(cid:40)(cid:42)(cid:56)(cid:47)(cid:36)(cid:55)(cid:50)(cid:53) (cid:54)(cid:43)(cid:44)(cid:41)(cid:55)(cid:40)(cid:53) (cid:43)(cid:44)(cid:42)(cid:43) (cid:54)(cid:44)(cid:39)(cid:40) (cid:57)(cid:54) (cid:39)(cid:53)(cid:44)(cid:57)(cid:40)(cid:53) (cid:53)(cid:41) (cid:21) (cid:37)(cid:56)(cid:41)(cid:41)(cid:40)(cid:53) (cid:25) (cid:50)(cid:56)(cid:55) (cid:47)(cid:50)(cid:36)(cid:39) (cid:53)(cid:41) (cid:38)(cid:41) (cid:22) (cid:38)(cid:50)(cid:48)(cid:51) (cid:57)(cid:54) (cid:38)(cid:41) (cid:47)(cid:50)(cid:58)(cid:3)(cid:54)(cid:44)(cid:39)(cid:40) (cid:39)(cid:53)(cid:44)(cid:57)(cid:40)(cid:53) (cid:38)(cid:50)(cid:48)(cid:51) (cid:47)(cid:50)(cid:42)(cid:44)(cid:38) (cid:47)(cid:57)(cid:42) (cid:42)(cid:49)(cid:39) (cid:23) (cid:24) (cid:39)(cid:28)(cid:25)(cid:44)(cid:49)(cid:23)(cid:22)(cid:22) January 2010 Doc ID 4946 Rev 6 1/12 www.st.com 12

Contents L6571A - L6571B Contents 1 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.3 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Oscillator frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 Order information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2/12 Doc ID 4946 Rev 6

L6571A - L6571B Maximum ratings 1 Maximum ratings 1.1 Absolute maximum ratings T able 1. Absolute maximum ratings Symbol Parameter Value Unit I (1) Supply current 25 mA S V Oscillator resistor voltage 18 V CF V Low side switch gate output 14.6 V LVG V High side switch source output -1 to V -18 V OUT BOOT V High side switch gate output -1 to V V HVG BOOT V Floating supply voltage 618 V BOOT V Floating supply vs OUT voltage 18 V BOOT/OUT dV VBOOT slew rate (Repetitive) ± 50 V/ns BOOT/dt dV VOUT slew rate (Repetitive) ± 50 V/ns OUT/dt T Storage temperature -40 to 150 °C stg T Junction temperature -40 to 150 °C J T Ambient temperature (Operative) -40 to 125 °C amb 1. The device has an internal zener clamp between GND and VS (typical 15.6 V).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) 1.2 Thermal data T able 2. Thermal data Symbol Parameter MDIP8 SO8 Unit R Thermal resistance junction-ambient max 100 150 °C/W thJA 1.3 Recommended operating conditions T able 3. Recommended operating conditions Symbol Parameter Min. Max. Unit V Supply voltage 10 VCL V S V Floating supply voltage - 500 V BOOT VBOOT V High side switch source output -1 V OUT -VCL f Oscillation frequency 200 kHz out Doc ID 4946 Rev 6 3/12

Pin connection L6571A - L6571B 2 Pin connection Figure 2. Pin connection (cid:57) (cid:20) (cid:27) (cid:37)(cid:50)(cid:50)(cid:55) (cid:54) (cid:53)(cid:41) (cid:21) (cid:26) (cid:43)(cid:57)(cid:42) (cid:38) (cid:22) (cid:25) (cid:50)(cid:56)(cid:55) (cid:41) (cid:42)(cid:49)(cid:39) (cid:23) (cid:24) (cid:47)(cid:57)(cid:42) (cid:39)(cid:28)(cid:23)(cid:44)(cid:49)(cid:19)(cid:24)(cid:28) Table 4. Pin description N° Pin Description 1 VS Supply input voltage with internal clamp [typ. 15.6V] Oscillator timing resistor pin. A buffer set alternatively to VS and GND can provide current to the external resistor RF connected between pin 2 and 3. Alternatively, 2 RF the signal on pin 2 can be used also to drive another IC (i.e. another L6569/71 to drive a full H-bridge) Oscillator timing capacitor pin. A capacitor connected between this pin and GND 3 CF fixes (together with RF) the oscillating frequency Alternatively an external logic signal can be applied to the pin to drive the IC. 4 GND Ground Low side driver output. The output stage can deliver 170mA source and 270mA 5 LVG sink [typ.values]. 6 OUT Upper driver floating reference High side driver output. The output stage can deliver 170mA source and 270mA 7 HVG sink [typ.values]. 8 BOOT Bootstrap voltage supply. It is the upper driver floating supply. 4/12 Doc ID 4946 Rev 6

L6571A - L6571B Electrical data 3 Electrical data V = 12V; V - V = 12V; T = 25 °C; unless otherwise specified. S BOOT OUT j Table 5. Electrical characteristcs Symbol Pin Parameter Test Condition Min. Typ. Max. Unit V 1 VS turn on threshold 8.3 9 9.7 V SUVP V VS turn off threshold 7.3 8 8.7 V SUVN V VS hysteresis 0.7 1 1.3 V SUVH V VS clamping voltage I = 5 mA 14.6 15.6 16.6 V CL S I Start up current V < V 150 250 μA SU S SUVN I Quiescent current V > V 500 700 μA q S SUVP I 8 Leakage current BOOT pin vs GND V = 580V 5 μA BOOTLK BOOT I 6 Leakage current OUT pin vs GND V = 562V 5 μA OUTLK OUT I 7 High side driver source current V = 6V 110 175 mA HVG SO HVG I High side driver sink current V = 6V 190 275 mA HVG SI HVG I 5 Low side driver source current V = 6V 110 175 mA LVG SO LVG I Low side driver sink current V = 6V 190 275 mA LVG SI LVG V 2 RF high level output voltage I =1mA V -0.05 V -0.2 V RFON RF S S V RF low level output voltage I = -1mA 50 200 mV RF OFF RF V 3 CF upper threshold 7.7 8 8.2 V CFU V CF lower threshold 3.80 4 4.3 V CFL L6571A 0.85 1.25 1.65 μs t Internal dead time d L6571B 0.50 0.72 0.94 μs Duty cycle, ratio between dead DC Time + conduction time of high 0.45 0.5 0.55 Side and low side drivers I 1 Average current from Vs No Load, fs = 60KHz 1.2 1.5 mA AVE f 6 Oscillation frequency RT = 12K; CT = 1nF 57 60 63 kHz out Doc ID 4946 Rev 6 5/12

Oscillator frequency L6571A - L6571B 4 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: Equation 1 Where R and C are the external resistor and capacitor. F F The device can be driven in "shut down" condition keeping the C pin close to GND, but F some cares have to be taken: 1. When CF is to GND the high side driver is off and the low side is on 2. The forced discharge of the oscillator capacitor C must not be shorter than 1us: a F simple way to do this is to limit the current discharge with a resistive path imposing R · C > 1 μs (see fig.1) F Figure 3. Fault signal (cid:20) (cid:27) (cid:21) (cid:26) (cid:53) (cid:53)(cid:41) (cid:22) (cid:25) (cid:73)(cid:68)(cid:88)(cid:79)(cid:87)(cid:86)(cid:76)(cid:74)(cid:81)(cid:68)(cid:79) (cid:38)(cid:41) (cid:23) (cid:24) (cid:42)(cid:49)(cid:39)(cid:48) Figure 4. Waveforms (cid:57)(cid:54) (cid:57)(cid:54)(cid:56)(cid:57)(cid:51) (cid:57)(cid:38)(cid:41) (cid:47)(cid:57)(cid:42) (cid:55)(cid:20) (cid:39)(cid:28)(cid:25)(cid:44)(cid:49)(cid:23)(cid:22)(cid:23) (cid:55)(cid:38) 6/12 Doc ID 4946 Rev 6

L6571A - L6571B Oscillator frequency Figure 5. T ypical dead time vs. temperature Figure 6. Typical rise and fall times vs. load dependency (L6571A) capacitance (cid:39)(cid:72)(cid:68)(cid:71)(cid:3)(cid:87)(cid:76)(cid:80)(cid:72)(cid:3)(cid:62)(cid:77)(cid:86)(cid:72)(cid:70)(cid:64) (cid:87)(cid:76)(cid:80)(cid:72)(cid:3)(cid:62)(cid:81)(cid:86)(cid:72)(cid:70)(cid:64) (cid:20)(cid:17)(cid:26) (cid:39)(cid:28)(cid:25)(cid:44)(cid:49)(cid:22)(cid:26)(cid:27)(cid:36) (cid:22)(cid:19)(cid:19) (cid:39)(cid:28)(cid:25)(cid:44)(cid:49)(cid:23)(cid:20)(cid:26) (cid:20)(cid:17)(cid:25) (cid:21)(cid:24)(cid:19) (cid:55)(cid:85) (cid:20)(cid:17)(cid:24) (cid:21)(cid:19)(cid:19) (cid:20)(cid:17)(cid:23) (cid:20)(cid:24)(cid:19) (cid:20)(cid:17)(cid:22) (cid:55)(cid:73) (cid:20)(cid:17)(cid:21) (cid:20)(cid:19)(cid:19) (cid:20)(cid:17)(cid:20) (cid:24)(cid:19) (cid:20) (cid:19) (cid:19)(cid:17)(cid:28) (cid:19) (cid:20) (cid:21) (cid:22) (cid:23) (cid:24) (cid:25) (cid:16)(cid:24)(cid:19) (cid:19) (cid:24)(cid:19) (cid:20)(cid:19)(cid:19) (cid:20)(cid:24)(cid:19) (cid:38)(cid:3)(cid:62)(cid:81)(cid:41)(cid:64) (cid:55)(cid:72)(cid:80)(cid:83)(cid:72)(cid:85)(cid:68)(cid:87)(cid:88)(cid:85)(cid:72)(cid:3)(cid:62)(cid:38)(cid:64) (cid:41)(cid:82)(cid:85)(cid:3)(cid:69)(cid:82)(cid:87)(cid:75)(cid:3)(cid:75)(cid:76)(cid:74)(cid:75)(cid:3)(cid:68)(cid:81)(cid:71)(cid:3)(cid:79)(cid:82)(cid:90)(cid:3)(cid:86)(cid:76)(cid:71)(cid:72)(cid:3)(cid:69)(cid:88)(cid:73)(cid:73)(cid:72)(cid:85)(cid:86)(cid:3)(cid:35)(cid:21)(cid:24)(cid:219)(cid:38)(cid:3)(cid:55)(cid:68)(cid:80)(cid:69) Figure 7. Typical frequency vs temperature Figure 8. Quiescent current vs. supply dependency voltage (cid:41)(cid:85)(cid:72)(cid:84)(cid:88)(cid:72)(cid:81)(cid:70)(cid:92)(cid:3)(cid:62)(cid:46)(cid:43)(cid:93)(cid:64) (cid:25)(cid:24) (cid:39)(cid:28)(cid:25)(cid:44)(cid:49)(cid:22)(cid:26)(cid:28)(cid:36) (cid:44)(cid:84)(cid:3)(cid:11)(cid:77)(cid:36)(cid:12) (cid:39)(cid:28)(cid:25)(cid:44)(cid:49)(cid:23)(cid:20)(cid:27) (cid:25)(cid:23) (cid:20)(cid:19)(cid:23) (cid:25)(cid:22) (cid:25)(cid:21) (cid:25)(cid:20) (cid:20)(cid:19)(cid:22) (cid:25)(cid:19) (cid:24)(cid:28) (cid:20)(cid:19)(cid:21) (cid:24)(cid:27) (cid:24)(cid:26) (cid:24)(cid:25) (cid:20)(cid:19) (cid:24)(cid:24) (cid:16)(cid:24)(cid:19) (cid:16)(cid:21)(cid:24) (cid:19) (cid:21)(cid:24) (cid:24)(cid:19) (cid:26)(cid:24) (cid:20)(cid:19)(cid:19) (cid:20)(cid:21)(cid:24) (cid:55)(cid:72)(cid:80)(cid:83)(cid:72)(cid:85)(cid:68)(cid:87)(cid:88)(cid:85)(cid:72)(cid:62)(cid:38)(cid:64) (cid:19) (cid:21) (cid:23) (cid:25) (cid:27) (cid:20)(cid:19) (cid:20)(cid:21) (cid:20)(cid:23) (cid:57)(cid:54)(cid:11)(cid:57)(cid:12) Figure 9. Typical and theoretical oscillator frequency vs resistor value (cid:73)(cid:3)(cid:11)(cid:46)(cid:43)(cid:93)(cid:12) (cid:20)(cid:24)(cid:19) (cid:39)(cid:28)(cid:25)(cid:44)(cid:49)(cid:22)(cid:27)(cid:19) (cid:55)(cid:75)(cid:72)(cid:82)(cid:85)(cid:72)(cid:87)(cid:76)(cid:70)(cid:68)(cid:79) (cid:20)(cid:19)(cid:19) (cid:28)(cid:19) (cid:38)(cid:32)(cid:22)(cid:22)(cid:19)(cid:83)(cid:41) (cid:27)(cid:19) (cid:38)(cid:32)(cid:24)(cid:25)(cid:19)(cid:83)(cid:41) (cid:26)(cid:19) (cid:38)(cid:32)(cid:20)(cid:81)(cid:41) (cid:25)(cid:19) (cid:24)(cid:19) (cid:22)(cid:19) (cid:21)(cid:19) (cid:24) (cid:25) (cid:26) (cid:27) (cid:28)(cid:20)(cid:19) (cid:20)(cid:24) (cid:21)(cid:19) (cid:22)(cid:19) (cid:23)(cid:19) (cid:24)(cid:19) (cid:53)(cid:72)(cid:86)(cid:76)(cid:86)(cid:87)(cid:82)(cid:85)(cid:3)(cid:57)(cid:68)(cid:79)(cid:88)(cid:72)(cid:3)(cid:11)(cid:46)(cid:82)(cid:75)(cid:80)(cid:12) Doc ID 4946 Rev 6 7/12

Package mechanical data L6571A - L6571B 5 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. Figure 10. DIP-8 mechanical data mm inch DIM. OUTLINEAND MIN. TYP. MAX. MIN. TYP. MAX. MECHANICALDATA A 3.32 0.131 a1 0.51 0.020 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 D 10.92 0.430 E 7.95 9.75 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 3.18 3.81 0.125 0.150 DIP-8 Z 1.52 0.060 8/12 Doc ID 4946 Rev 6

L6571A - L6571B Package mechanical data T able 1. SO-8 mechanical data mm. inch Dim. Min Typ Max Min Typ Max A 1.35 1.75 0.053 0.069 A1 0.10 0.25 0.004 0.010 A2 1.10 1.65 0.043 0.065 B 0.33 0.51 0.013 0.020 C 0.19 0.25 0.007 0.010 (1) 4.80 5.00 0.189 0.197 D E 3.80 4.00 0.15 0.157 e 1.27 0.050 H 5.80 6.20 0.228 0.244 h 0.25 0.50 0.010 0.020 L 0.40 1.27 0.016 0.050 k 0° (min.), 8° (max.) ddd 0.10 0.004 1. Dimensions D does not include mold flash, protru-sions or gate burrs. Mold flash, potrusions or gate burrs shall not exceed 0.15mm (.006inch) in total (both side). Figure 11. Package dimensions Doc ID 4946 Rev 6 9/12

Order information L6571A - L6571B 6 Order information Table 6. Ordering information Order codes Package Packaging L6571A DIP-8 Tube L6571AD SO8 L6571AD013TR Tape and reel L6571B DIP-8 Tube L6571BD SO8 L6571BD013TR Tape and reel 10/12 Doc ID 4946 Rev 6

L6571A - L6571B Revision history 7 Revision history Table 7. Document revision history Date Revision Changes 14-Jan-2004 5 No history because migration 15-Jan-2010 6 Updated Table6 on page10 Doc ID 4946 Rev 6 11/12

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