ATA6821_05

Features • • • • • • • • • Push-pull Output Stage for 4A Peak Current Low Rdson < 2Ω 12V Push-pull Output Stage for Pulse Shaping Super Short Propagation Delay Input-output 50 ns Super Fast Rise/Fall Time of Output Stage 12 ns Monitoring Circuit with 60 ns Switch-off Delay and 20 ms Lockout Undervoltage Lockout 40 ms Wide Supply Voltage Range from16V up to 30V Fully Integrated Charge Pump High Speed Power Driver IC ATA6821 Electrostatic sensitive device. Observe precautions for handling. 1. Description The ATA6821 is a single-channel high-speed power driver IC designed with Atmel’s 0.8 µm BCDMOS technology. With its extremely short propagation delay and super fast slew rates, the ATA6821 is ideally suited to control MOSFETs or IGBTs in a wide range of automotive and industrial high-speed applications. The push-pull output stage is capable of driving peak currents of 4A. The ATA6821 is designed to control high currents as they can be found in electrical machines or in power converters. The ATA6821 is tailored to control low resistance switching devices by a potential-free input signal. The ATA6821’s full automotive qualification, ESD protection and protection against transients according to ISO/TR 7637/1 guarantees security for all kind of applications. Rev. 4778B–AUTO–09/05 Figure 1-1. Block Diagram VS Voltage Monitoring Monoflop Monoflop 1/3 VS 40 ms 20 ms 70K Undervoltage Detection MONITOR 3 12 V FEED 8 7 V/ 4V Charge Pump Control Logic Push Pull Output Stage VS 1, 2 9 15K Pulse Shaping OUTPUT 13, 14 MeasureLogic TestLogic PGND 11, 12 GND 10 MEAS 5 TEST 7 2 ATA6821 4778B–AUTO–09/05 ATA6821 2. Pin Configuration Figure 2-1. Pinning SO14 VS VS MONITOR NC MEAS NC TEST 1 2 3 4 5 6 7 14 13 12 11 10 9 8 OUTPUT OUTPUT PGND PGND GND INPUT FEED Table 2-1. Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Note: Pin Description Symbol VS VS MONITOR NC MEAS NC TEST FEED INPUT GND PGND PGND OUTPUT OUTPUT Function Supply voltage Supply voltage Voltage monitoring input Not connected Measurement pin Not connected Test pin Feed output Input Ground(1) Power ground(1) Power ground(1) Output Output 1. All ground pins must be connected together by short external connections. The measurement pin (pin 5) and the test pin (pin 7) must be connected to the ground pins. 3 4778B–AUTO–09/05 3. Functional Description The ATA6821 controls a push-pull power output stage for an external power device and a feedback output stage. If the voltage at the input pin is > 7V, both outputs are at “high-level”, if the input voltage falls below the switch-off threshold of 4V, both outputs are switched to ground. If a rectangular input signal is fed to the input, the feedback output “Feed” is not used and pin 8 needs no external connection. In case the input signal, however, comes from a transformer (potential-free control; see Figure 7-5 on page 12), the integrated pulse shaping circuit is used to achieve a reliable feedback configuration at the input. This ensures correct switching of the output stage even if the input signal is very noisy. For the timing of input and output signals and the slew rates, please refer to Figure 7-1 on page 9. The timing diagram is based on the following test conditions: A 2 kΩ resistor is connected between pin 8 and ground; a 2 kΩ resistor and a 1 nF capacitor are used as load for the power output (pins 13 and 14) simulating identical conditions as a power MOSFET, which is usually connected to the output. 3.1 Undervoltage Detection During power-up and power-down of the supply voltage, the internal undervoltage circuit suppresses uncontrolled output pulses. In case of undervoltage (VS < 16V), the feedback output and the power output are switched off and locked for 40 ms. When the supply voltage has reached the switch-on-threshold of about 17V, both output stages are enabled after a delay time of 40 ms. 3.2 Voltage Monitoring An effective short-circuit detection of the external device is achieved by a drain-source voltage monitor. The voltage monitor comparator (pin 3) has a threshold of 1/3 × VS. If the voltage applied to pin 3 exceeds this voltage, both output stages are switched off immediately and locked for 20 ms. With a hysteresis of 200 mV, the outputs are enabled again after a delay time of 20 ms. A voltage divider connected to VS is used to feed the input voltage to pin 3. A decoupling diode is recommended if the external power device‘s drain source voltage exceeds 30V (see Figure 7-3 on page 10). With the help of an external capacitor, connected to pin 3, the switching characteristic of the voltage monitor comparator can be varied according to the rising edge of the input signal at pin 9. During the off cycle, the capacitor is discharged, during the on-cycle, it is charged again. If the voltage monitoring function is not used, pin 3 should be connected to ground (see Figure 7-2 on page 10). 4 ATA6821 4778B–AUTO–09/05 ATA6821 3.3 Application Hints Due to high peak output currents, the layout of the PC board is essential. Appropriate decoupling capacitors should be used, otherwise, the performance of the driver degrades severely. It is strongly recommended to connect the blocking capacitors (low ESR types) as close as possible to the power supply and the ground pins. If necessary, two or more capacitors of different types may be connected in parallel. The two power ground pins, the ground pin, the two output pins and the two supply pins should be externally connected together as close as possible to the pins. The measurement pin (pin 5) and the test pin (pin 7) must not be used in any application and need to be tied to ground. 5 4778B–AUTO–09/05 4. Absolute Maximum Ratings Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Parameters Supply voltage Input voltage, voltage monitoring Output voltage Output voltage FEED Input voltage Input voltage measurement Input voltage TEST pin Output current FEED Output current Output current t ≤ 100 µs Ambient temperature range Junction temperature range Storage temperature range Pin 1, 2 3 13, 14 8 9 5 7 8 13, 14 13, 14 Symbol VS VMonitor VOut VFEED VInput VMeas VTest IFEED IOut iOut Tamb Tj Tstg Min. –0.3 –0.3 –0.3 –0.3 –0.3 –0.3 –0.3 –10 –200 –4 –40 to +100 –40 to +150 –40 to +150 Max. 30 VS + 0.3 VS + 0.3 15 40 VS + 0.3 5 10 200 4 Unit V V V V V V V mA mA A °C °C °C 5. Thermal Resistance Parameters Junction to ambient Symbol RthJA Value 130 Unit K/W 6. ESD Protection Parameters ESD (Human Body Model) ESD CDM (Charged Device Model) Test Conditions MIL-STD-883D Method 3015.7 STM 5.3.1 - 1999 Value ±2 kV (pins 3 and 9: 1 kV) ±500V 6 ATA6821 4778B–AUTO–09/05 ATA6821 7. Electrical Characteristics Conditions: 16V < VS < 30V; –40°C < TA < 100°C V1 = V2 = VS, V13 = V14 = VOut, V4 = V5 = V6 = V7 = 0V V10 = V11 = V12 = GND = Reference point, unless otherwise specified No. 1 1.1 2 3 3.1 3.2 3.3 4 4.1 4.2 4.3 4.4 4.5 5 5.1 5.2 5.3 5.4 5.5 6 6.1 6.2 6.3 6.4 6.5 Parameters Supply Voltage Range Supply voltage Current Consumption Vs ≤ 30V; no load at “Feed” and “Output” 1, 2 1, 2 VS IVS 16 30 6 V mA C A Test Conditions Pin Symbol Min. Typ. Max. Unit Type* Undervoltage Detection (UVD) Switch-on threshold UVD Hysteresis UVD Timeout after undervoltage Voltage Monitoring (VM) Input Resistance Switch-off threshold VM Hysteresis VM Switch-off-delay monitor-output Timeout after switch-off by voltage monitoring Input Stage Input Resistance Switch-on-threshold Switch-off-threshold Propagation delay-time “Input - Feed” Propagation delay-time “Input - Output” Feed Output High voltage Feed, no load Output resistance high Output resistance low Pin 8 open, V9 ≥ 8V IFeed = –5 mA, V9 ≥ 8V IFeed = 5 mA, V9 ≤ 3V 8 8 8 8 8 VFeed0 RFeedHi RFeedLo trFeed tfFeed 13 500 100 20 10 1000 500 V Ω Ω ns ns A A A A A 9 9 9 8, 9 9 to 13 RiInput VINON VINOFF tdIn-Feed tdIn-Out 6 3 30 50 15 8 5 kΩ V V ns ns A A A A A 3 3 3 3 to 13, 14 3 to 13, 14 RiVM VToff dVS tdoffVM toffVM 15 30 VS/3 –2% 70 VS/3 200 60 20 25 150 VS/3 + 4% kΩ V mV ns ms A A A A A 1, 2 1, 2 1, 2 VSon dVSon toffUVD 30 16 17 300 40 50 18 V mV ms A A A R external = 2 kΩ, Rise time (10% to 90%) Feed Rising edge at pin 9 Fall time (10% to 90%) RFeed external = 2 kΩ, Falling edge at pin 9 *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter 7 4778B–AUTO–09/05 7. Electrical Characteristics (Continued) Conditions: 16V < VS < 30V; –40°C < TA < 100°C V1 = V2 = VS, V13 = V14 = VOut, V4 = V5 = V6 = V7 = 0V V10 = V11 = V12 = GND = Reference point, unless otherwise specified No. 7 7.1 7.2 7.3 7.4 Parameters Push-pull-outputstage On-resistance high On-resistance low Peak output current high Peak output current low IOut = –1 A, V9 ≥ 8V IOut = 1A, V9 ≤ 3V t ≤ 100 µs, rising edge at pin 9 t ≤ 100 µs, falling edge at pin 9 13 - 1, 2 13 13,14 13,14 ROutHigh ROutLow -iOut iOut trOut 12 2 2 4 4 Ω Ω A A A A D D Test Conditions Pin Symbol Min. Typ. Max. Unit Type* 7.5 Rising edge at pin 9 Rise time (10% to 90%) external load: COut = 1 nF, ROut = 2 kΩ Falling edge at pin 9 Fall time (10% to 90%) external load: COut = 1 nF, ROut = 2 kΩ 13,14 ns A 7.6 13,14 tfOut 12 ns A *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter 8 ATA6821 4778B–AUTO–09/05 ATA6821 Figure 7-1. Timing Diagram(1) 1 VINPUT 15 V 7V 4V t VFEED 10 V 9V 1V t trFeed tfFeed VOUTPUT 24 V 21.6 V 2.4 V t td In-Feed td In-Out tr Out td In-Feed tdIn-Out tfOut Note: 1. A 2 kΩ resistor is connected between pin 8 and ground; a 2 kΩ resistor and a 1 nF capacitor are used as load for the power output (pins 13 and 14), simulating identical conditions as a power MOSFET, which is usually connected to the output. 9 4778B–AUTO–09/05 Figure 7-2. Application Circuit 1: Power Driver with Minimum External Components VS Monoflop Monoflop 1/3 VS 40 ms 20 ms 70K Voltage Monitoring MONITOR 3 Undervoltage Detection 12 V FEED 8 Charge Pump VS LOAD Control 7 V/ 4V VS 1, 2 Logic 9 INPUT 15K Pulse Shaping Push Pull Output Stage OUTPUT 13, 14 + CVS PGND 11, 12 MeasureLogic TestLogic GND 10 MEAS 5 TEST 7 GND Figure 7-3. Application Circuit 2: Driver Circuit with Short-circuit Monitoring via the Drain-source Voltage of the Power Device VS Voltage Monitoring Monoflop Monoflop 1/3 VS 40 ms 20 ms 70K MONITOR 3 Undervoltage Detection 12 V FEED 8 Charge Pump VS LOAD Control 7 V/ 4V VS 1, 2 Logic 9 15K Pulse Shaping Push Pull Output Stage OUTPUT 13, 14 + CVS PGND 11, 12 MeasureLogic TestLogic GND 10 MEAS 5 TEST 7 GND 10 ATA6821 4778B–AUTO–09/05 ATA6821 Figure 7-4. Application Circuit 3: Six ATA6821 Used to Control a Three-phase Asynchronous Machine VS1 Driver 1 VT1 VS2 Driver 2 VS3 Driver 3 VT2 VS4 L2 VT3 VS6 VS5 L1 L3 Driver 5 VP Asynchronous machine Driver 4 Driver 6 11 4778B–AUTO–09/05 Figure 7-5. 12 VS Voltage Monitoring Monoflop 1/3 VS 40 ms 20 ms 70K 3 Monoflop MONITOR ATA6821 Undervoltage Detection 12 V V1 t V2 t V3 Charge Pump VTn VS 1, 2 t VTn VS Vp 1 Control 7 V/ 4V 15K Pulse Shaping 2 3 FEED 8 µC Logic OUTPUT 13, 14 INPUT 9 Push Pull Output Stage + CVS DGND MeasureLogic TestLogic 1:3 External Components for one ATA6821 in Application Circuit 3: Potential-free Control of a Three-phase Asynchronous Machine PGND 11, 12 GND 5 TEST 7 10 MEAS VTn 4778B–AUTO–09/05 ATA6821 8. Ordering Information Extended Type Number ATA6821-TUSY ATA6821-TUQY Package SO14 SO14 Remarks Tubed, Pb-free Taped and reeled, Pb-free 9. Package Information Package SO14 Dimensions in mm 8.75 5.2 4.8 3.7 1.4 0.4 1.27 7.62 14 8 0.25 0.10 0.2 3.8 6.15 5.85 technical drawings according to DIN specifications 1 7 10. Revision History Please note that the following page numbers referred to in this section refer to the specific revision mentioned, not to this document. Revision No. 4778B-AUTO-09/05 History • Put datasheet in a new template • Pb-free logo on page 1 added • Ordering Information on page 13 changed 13 4778B–AUTO–09/05 Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 487-2600 Atmel Operations Memory 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 436-4314 RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany Tel: (49) 71-31-67-0 Fax: (49) 71-31-67-2340 1150 East Cheyenne Mtn. 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