ALTAIR05T-800TR STMicroelectronics, ALTAIR05T-800TR Datasheet
ALTAIR05T-800TR
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ALTAIR05T-800TR Summary of contents
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... Compact SMPS that requires a precise current and/or voltage regulation Description ALTAIR05T-800 is a high-voltage all-primary sensing switcher intended for operating directly from the rectified mains with minimum external parts. It combines a high-performance low- voltage PWM controller chip and an 800 V avalanche-rugged power section in the same package ...
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... Cable drop compensation (CDC 5.8 Burst-mode operation at no load or very light load . . . . . . . . . . . . . . . . . . 20 5.9 Soft-start and starter block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.10 Hiccup mode OCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 5.11 Layout recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 6 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 8 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 2/28 Doc ID 17957 Rev 1 ALTAIR05T-800 ...
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... ALTAIR05T-800 1 Device description The device combines two silicon in the same package: a low voltage PWM controller and an 800 V avalanche rugged power section. The controller chip is a current-mode specifically designed for offline quasi-resonant flyback converters. The device features a unique characteristic capable of providing constant output voltage (CV) and constant output current (CC) regulation using primary-sensing feedback ...
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... SOURCE SOURCE DRAIN DRAIN SOURCE SOURCE DRAIN DRAIN DRAIN Vcc Vcc DRAIN DRAIN DRAIN GND GND DRAIN DRAIN IREF IREF N.C. N.C. ZCD/FB ZCD/ N.A. N.A. COMP COMP N.A. N. CDC CDC N.A. N.A. Function Doc ID 17957 Rev 1 ALTAIR05T-800 ...
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... ALTAIR05T-800 Table 1. Pin functions (continued) N. Name Transformer’s demagnetization sensing for quasi-resonant operation. Input/output voltage monitor. A negative-going edge triggers MOSFET’s turn-on. The current sourced by the pin during ON-time is monitored to get an image of the input voltage to the converter, in order to compensate the internal delay of the current sensing circuit and achieve a CC regulation independent of the mains voltage. If this current does not exceed 50µ ...
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... Thermal resistance, junction-to-ambient th j-amb 6/28 Parameter Supply voltage (Icc < 25mA) Zero current detector current Analog inputs and outputs Maximum sunk current Power dissipation @T = 50°C A Junction temperature range Storage temperature Parameter Doc ID 17957 Rev 1 ALTAIR05T-800 Value Unit -1 to 800 1A Self limiting V ± ...
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... ALTAIR05T-800 4 Electrical characteristics (T = -25 to 125 °C, Vcc = 14 V; unless otherwise specified) J Table 4. Electrical characteristics Symbol Parameter Power section V Drain-source breakdown (BR)DSS I Off state drain current DSS R Drain-source ON-state resistance DS(on) C Effective (energy-related) output capacitance (See oss High-voltage start-up generator V Min. Drain start voltage ...
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... COMP V = 2.7V 1.65V ZCD COMP V = 2.3 V ZCD V = 2.7 V ZCD V = 1.1V 1µA COMP CDC ( COMP COMPL ( 200 mV/µ (1) Doc ID 17957 Rev 1 ALTAIR05T-800 Min. Typ. Max. Unit -90 -60 -30 mV 100 110 120 -25 -50 -75 µA 6 µs 30 Ω 45 2.46 2.5 2.54 V 2.42 2.58 1.3 2.2 3 ...
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... ALTAIR05T-800 Figure 3. C OSS Figure 4. Off state drain and source current test circuit Note: The measured I DSS effective MOSFET’s off state drain current. Figure 5. Start-up current test circuit output capacitance variation C (pF) OSS 500 400 300 200 100 ( OMP the sum between the current across the start-up resistor and the ...
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... Operating supply current test circuit Note: The circuit across the ZCD pin is used for switch-on synchronization Figure 8. Quiescent current during fault test circuit 10/28 Iq_ m eas 2 OMP OMP - OMP Doc ID 17957 Rev 1 ALTAIR05T-800 SOU 0 15V AIN SOU 14V AIN SOU 150V ...
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... Decreasing the load result in frequency reduction, which can go down even to few hundred hertz, thus minimizing all frequency-related losses and making it easier to comply with energy saving regulations or recommendations. Being the peak current very low, no issue of audible noise arises. Figure 9. Multi-mode operation of ALTAIR05T-800 ...
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... This prevents converter’s restart attempts and ensures monotonic output Start voltage decay at system power-down. 12/28 threshold start pin. CC Figure 10, when power is applied to the circuit and (10.5V typ.), during each MOSFET’s off-time the HV current restart Doc ID 17957 Rev 1 ALTAIR05T-800 of 800 V min. and a (BR)DSS typically. When the CCOn . CCrestart ...
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... ALTAIR05T-800 Figure 10. Timing diagram: normal power-up and power-down sequences Vin Vin V V Start Start Vcc Vcc Vcc Vcc ON ON Vcc Vcc restart restart DRAIN DRAIN I I charge charge 5.5 mA 5.5 mA Power-on Power-on 5.3 Zero current detection and triggering block The zero current detection (ZCD) and triggering blocks switch on the power MOSFET if a negative-going edge falling below applied to the ZCD/FB pin ...
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... BLANK turns-on the MOSFET. In this way one or more drain ringing cycles is Figure 12) and the switching frequency is prevented from . osc in' P (limit condition) Doc ID 17957 Rev 1 ALTAIR05T-800 operation” and “Section 5.6: Voltage osc = P < in'' in < in''' in'' ...
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... ALTAIR05T-800 5.4 Constant voltage operation The IC is specifically designed to work in primary regulation and the output voltage is sensed through a voltage partition of the auxiliary winding, just before the auxiliary rectifier diode. Figure 13 shows the internal schematic of the constant voltage mode and the external connections ...
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... R Figure 14. Current control principle R zcd Aux 16/28 15. has to be chosen so that its voltage PRI CREF -------------- ------------------------------------ - ⋅ ⋅ OUT SEC SENSE S ZCD/ DEMAG LOGI Doc ID 17957 Rev 1 ALTAIR05T-800 . REF can be considered (2) ) SENSE . PWM Logic - rom Rsense Q 1 IREF Cref CREF . ...
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... ALTAIR05T-800 Figure 15. Constant current operation: Switching cycle waveforms 5.6 Voltage feedforward block The current control structure uses the voltage V (2). Actually, the CC comparator is affected by an internal propagation delay Td, which switches off the MOSFET with a peak current than higher the foreseen value. ...
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... ZCD/FB F eedf orward . Logic ⋅ AUX ⋅ R ZCD ⋅ PRI d SENSE value: during MOSFET’s ON-time, the current ZCD , is compared with an internal reference current I ZCD Doc ID 17957 Rev 1 ALTAIR05T-800 DRAIN PWM Block CC LOGI SOU RCE Rsense (4) (-50 ZCDON ...
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... ALTAIR05T-800 Figure 17 presents the internal schematic. Figure 17. CDC block: internal schematic Rcdc ZCD/ During CV regulation, as the CDC block is capable of sinking current, a resistor connect between its output and ZCD/FB pin allows to increase the CV setpoint, by providing a voltage lower than the internal reference voltage by an amount proportional to the average load current ...
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... COMPL along with the others previously described, is noise-free since the T T START START Burst-mode value is not important to define the soft-start time, as its duration depends Doc ID 17957 Rev 1 ALTAIR05T-800 START 65 mV hyster START START Normal-mode capacitor. ...
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... Layout recommendations A proper printed circuit board layout is essential for correct operation of any switch-mode converter and this is true for the ALTAIR05T-800 as well. Careful component placing, correct traces routing, appropriate traces widths and compliance with isolation distances are the major issues. In particular: ● ...
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... Application information Figure 20. Suggested routing for converter 22/28 DRAIN CDC VDD FB/ZCD ALTAIR05T-800 COMP GND IREF SOURCE Doc ID 17957 Rev 1 ALTAIR05T-800 OUT GND ...
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... ALTAIR05T-800 6 Typical application Figure 21. Test board schematic wide range mains CC/CV battery charger TBD Table 5. Efficiency at 115 V Load [%] 100 Table 6. Efficiency at 230 V Load [%] 100 L1 470uH BR MB6S 4.7uF 4. 7uF 400V 400V BAT46 10uF U 1 ALTAIR 05 VDD D RAI ENT SOU 470nF 7nF 1nF ...
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... Doc ID 17957 Rev 1 ALTAIR05T-800 inch Min Typ 0.004 0.014 0.007 0.020 (typ.) 0.386 0.228 0.050 0.350 0.150 0.181 0.150 8 °(max.) ® Max 0.069 ...
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... ALTAIR05T-800 Figure 22. Package dimensions Doc ID 17957 Rev 1 Package mechanical data 25/28 ...
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... Order codes 8 Order codes Table 8. Ordering information Order code ALTAIR05T-800 ALTAIR05T-800TR 26/28 Package SO16N Doc ID 17957 Rev 1 ALTAIR05T-800 Packaging Tube Tape and reel ...
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... ALTAIR05T-800 9 Revision history Table 9. Document revision history Date 25-Oct-2010 Revision 1 Initial release. Doc ID 17957 Rev 1 Revision history Changes 27/28 ...
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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 28/28 Please Read Carefully: © 2010 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com Doc ID 17957 Rev 1 ALTAIR05T-800 ...