STEF05 STMicroelectronics, STEF05 Datasheet
STEF05
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STEF05 Summary of contents
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... Set-top boxes ■ DVD and Blu-ray disc drivers Description The STEF05 is an integrated electronic fuse optimized for monitoring output current and input voltage. Connected in series rail capable of protecting the electronic circuitry on its output from overcurrent and overvoltage. The device has a controlled delay and turn-on time ...
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... Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.1.1 5.1.2 5.1.3 5.1.4 5.1.5 5.2 R limit calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5.3 C calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 dv/dt 5.4 Enable/Fault pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2/20 Turn- Normal operating condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Output voltage clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Current limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Thermal shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Doc ID 019055 Rev 4 STEF05 ...
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... STEF05 1 Device block diagram Figure 1. STEF05 block diagram AM09891v1 Doc ID 019055 Rev 4 Device block diagram 3/20 ...
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... An external capacitor can be 9 dv/dt added to this pin to increase the ramp time additional capacitor is not required, this pin should be left open. 10 GND Ground pin 11 V Exposed pad. Positive input voltage must be connected 4/20 GND dv/dt V En/fault CC I-Limit N/C AM09867v1 Note Doc ID 019055 Rev 4 STEF05 . CC ...
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... STEF05 3 Maximum ratings Table 3. Absolute maximum ratings Symbol Positive power supply voltage (steady state Positive power supply voltage (max 100 ms) V /source (max 100 ms) OUT I-Limit (max 100 ms) En/Fault dv/dt T Operating junction temperature range op T Storage temperature range STG T Lead temperature (soldering) 10 sec LEAD 1 ...
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... Electrical characteristics 4 Electrical characteristics 3 Table 6. Electrical characteristics for the STEF05 Symbol Parameter Under/overvoltage protection V Output clamping voltage Clamp V Undervoltage lockout UVLO V UVLO hysteresis Hyst Power MOSFET t Delay time dly R On-resistance DSon V Off state output voltage OFF I Continuous current ...
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... STEF05 Table 6. Electrical characteristics for the STEF05 (continued) Symbol Parameter V Minimum operating voltage min Thermal latch TSD Shutdown temperature 1. Pulse test: Pulse width = 300 µs, duty cycle = 2% 2. Guaranteed by design, but not tested in production Test conditions (2) Doc ID 019055 Rev 4 Electrical characteristics Min ...
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... After an initial delay time of typically 500 µs, the output voltage is supplied with a slope defined by the internal dv/dt circuitry additional capacitor is connected to dv/dt pin, the total time from the Enable signal going high and the output voltage reaching the nominal value is around 1 ms (refer to 8/20 Figure Doc ID 019055 Rev 4 STEF05 AM09868v1 AM09869v1 ...
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... STEF05 5.1.2 Normal operating condition The STEF05 E-fuse behaves like a mechanical fuse, buffering the circuitry on its output with the same voltage shown at its input, with a small voltage fall due to the N-channel MOSFET R . DSOn 5.1.3 Output voltage clamp This internal protection circuit clamps the output voltage to a maximum safe value, typically 6 ...
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... OUT delay ramp-up time time Time threshold and then releasing it. il Doc ID 019055 Rev 4 STEF05 slope (Figure 5 ). OUT × dvdt AM09870v1 VOUT EN/Fault Figure 6 ). This signal can ...
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... STEF05 Figure 6. Enable/Fault pin status Normal operating condition Thermal fault condition Off/Reset time Doc ID 019055 Rev 4 Typical application AM09871v1 11/20 ...
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... Doc ID 019055 Rev 4 UVLO voltage vs. temperature - 125 Temperature ° infinite - 125 Temperature ° Ω LIMIT LOAD - 125 Temperature °C STEF05 AM09873v1 150 AM09875v1 150 AM09877v1 150 ...
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... STEF05 Figure 13. Current limit vs ° 5.00 4.00 3.00 2.00 1.00 0. External Sense Resistor (Ω ) Figure 15. V ramp-up vs. Enable OUT µ 100 µ OUT C dv/dt Figure 17. Line transient = 22 Ω from LIMIT 100 µs Figure 14. Thermal latch delay vs. power ...
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... Typical performance characteristics Figure 19. Thermal latch from 2 A load to short-circuit = 22 Ω LIMIT 14/20 Figure 20. Startup into output short-circuit (fast rise Ω LIMIT Doc ID 019055 Rev 4 STEF05 = Connected to GND OUT ...
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... STEF05 7 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: ® ECOPACK trademark. Table 7. DFN10L (3x3 mm.) mechanical data Dim ...
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... Package mechanical data Figure 21. DFN10L package outline 16/20 Doc ID 019055 Rev 4 STEF05 7426335_G ...
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... STEF05 Tape & reel QFNxx/DFNxx (3x3) mechanical data Dim. Min 12 mm. Typ. Max. Min. 180 13.2 0.504 0.795 2.362 14.4 3.3 3.3 1 Doc ID 019055 Rev 4 Package mechanical data inch. Typ. Max. 7.087 0.519 0.567 0.130 0.130 0.043 0.157 0.315 ...
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... Package mechanical data Figure 22. DFN10L footprint - recommended data (dimensions in mm.) 18/20 7426335_G Doc ID 019055 Rev 4 STEF05 ...
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... STEF05 8 Revision history Table 8. Document revision history Date 15-Jul-2011 08-Aug-2011 15-Dec-2011 06-Mar-2012 Revision 1 Initial release. 2 Modified definition for T 3 Removed V and I dv/dt Updated: package mechanical data 4 on page 16 Figure 22 on page 18 and Doc ID 019055 Rev 4 Revision history Changes in Table 3: Absolute maximum ratings ...
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... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 20/20 Please Read Carefully: © 2012 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com Doc ID 019055 Rev 4 STEF05 ...