VIPER222XSTR

VIPER222 Datasheet High voltage converter Features • • • • • 730 V avalanche rugged power MOSFET PWM controller 1.2 V reference voltage Frequency jittering 40 mW no load input power at 230 VAC • • Short-circuit protection Thermal shutdown Application • Auxiliary SMPS for home appliances, consumer, industrial, lighting. Description The VIPER222 device is a high performance high voltage converter that combines a 730 V rugged power MOSFET with a PWM control. The device embeds the high voltage startup and the current sense circuit, avoiding the use of extra components in the BoM. Frequency jittering spreads the EMI and allows the use of a small filter. The burst mode technique allows to obtain a very low input power consumption at light load. Figure 1. Block diagram Product status link Vcc DRAIN VIPER222 Product label Istart-up OSCILLATOR SOFT START S PWM OCP BLOCK LOGIC Q R DIS - EA-IN + 1.2V E/A Rsense PROTECTIONS EA-OUT DS13192 - Rev 2 - January 2020 For further information contact your local STMicroelectronics sales office. GND www.st.com VIPER222 Pin setting 1 Pin setting Figure 2. Connection diagram GND 1 10 DRAIN VCC 2 9 DRAIN NC 3 8 DRAIN EA-IN 4 7 DRAIN EA-OUT 5 6 DRAIN Table 1. Pin description DS13192 - Rev 2 SSOP10 Name 1 GND Connected to the source of the internal power MOSFET and controller ground reference. 2 VCC Supply voltage of the control section. This pin provides the charging current of the external capacitor. 3 NC 4 EA-IN 5 EA-OUT 6-10 DRAIN Function Not connected. The pin must be connected to GND pin. Input of the error amplifier. Output of the error amplifier. High voltage drain pin. The start-up bias current is drawn from this pin too. Connect to a PCB copper area to facilitate the heat dissipation. page 2/20 VIPER222 Typical power capability 2 Typical power capability Table 2. Typical power VIN: 230 VAC VIN: 85 - 265 VAC Adapter (1) Open frame (2) Adapter (1) Open frame (2) 11 W 13 W 7W 8W 1. Typical continuous power in non-ventilated enclosed adapter measured at 50 °C ambient. 2. Maximum practical continuous power in an open frame design at 50 °C ambient, with adequate heat-sinking DS13192 - Rev 2 page 3/20 VIPER222 Electrical and thermal ratings 3 Electrical and thermal ratings Table 3. Absolute maximum rating Symbol Pin VDS 6-10 Drain-to-source (ground) voltage ID 6-10 Pulse drain current (limited by TJ = 150 °C) VEA-IN 4 Input pin voltage VEA-OUT 5 VCC ICC PTOT TJ TSTG Parameter Value Min. Max. Unit 730 V 2 A -0.3 4.8 V Out pin voltage -0.3 4.8 V 2 Supply voltage -0.3 Self limited V 2 Input current 45 mA Power dissipation at TAMB < 50 °C 1(1) W Junction temperature range -40 150 °C Storage temperature -55 150 °C 1. When mounted on a standard single side FR4 board with 100 mm² (0.1552 inch) of Cu (35 μm thick).. Table 4. Thermal data Symbol RTH-JC RTH-JC RTH-JC RTH-JC Parameter Thermal resistance junction to case (1) (Dissipated power = 1 W) Thermal resistance junction ambient (1) (Dissipated power = 1 W) Thermal resistance junction to case (2) (Dissipated power = 1 W) Thermal resistance junction ambient (2) (Dissipated power = 1 W) Max. value Unit 10 °C/W 155 °C/W 5 °C/W 95 °C/W 1. When mounted on a standard single side FR4 board with minimum copper area. 2. When mounted on a standard single side FR4 board with 100 mm2 (0.155sq in) of Cu (35 μm thick). DS13192 - Rev 2 page 4/20 VIPER222 Electrical and thermal ratings Figure 3. Rth vs. area RTHjA/(RTHjA@A=100 mm2) 1.75 1.625 1.5 1.375 1.25 1.125 1 0.875 0.75 0 25 50 75 100 125 150 175 200 A(mm2) DS13192 - Rev 2 page 5/20 VIPER222 Electrical characteristics 4 Electrical characteristics (TJ = 25 °C, VCC = 9 V; unless otherwise specified) Table 5. Electrical characteristics Symbol Parameter VBVDSS Breakdown voltage RDS(on) Drain-Source ON state resistance Test Condition ID = 1 mA, EA-OUT= GND Typ. VDRAIN = 100 V IDSS OFF state DRAIN leakage current VDRAIN = 730 V 15 13 Startup charging current ICH2 Charging current during operation ICH3 Charging current during self-supply VCC Operating voltage range VDRAIN = 100 V VCC=0 V VDRAIN = 100 V VCC = 6 V VDRAIN = 100 V VCC = 6 V ICC = 35 mA Ω pF 50 µA 30 V -0.6 -1.4 mA -2 -4 mA -6 -9 mA 4.5 30 V Drain-source start voltage ICH1 Unit V TJ = 25 °C Effective (energy related) output capacitance Max. 730 ID = 0.2 A; COSS VSTART Min. VCLAMP VCC clamp voltage VON VCC ON threshold 15 16 17 V VCCL VCC low value 4 4.25 4.5 V VOFF UVLO 3.75 4 4.25 V ICC0 Operating supply current, not switching 0.5 mA 30 V Not switching VDS = 150 V VEA-OUT = 1.2 V ICC1 Operating supply current, switching 1.3 FOSC = 30 kHz VDS = 150 V VEA-OUT = 1.2 V 1.6 mA FOSC = 60 kHz ICC_FAIL ILIM Drain current limit (OCP) 30 TJ =25 °C TJ = 25 °C mA 0.59 0.62 0.65 A 105 130 155 mA ILIM_BM Drain current limit at low load TON(MIN) Minimum turn ON time 350 ns tRESTART Restart time after fault 1.2 s Overload delay time 55 ms tOVL DS13192 - Rev 2 VCC clamp protection VEA-OUT = VEA_BM page 6/20 VIPER222 Electrical characteristics Symbol Parameter Test Condition Min. Typ. VIPER222XSTR tOVLmax Maximum overload delay FOSC = FOSCmin time VIPER222LSTR tCC_FAIL FOSC FOSCmin Soft-start time 5 Clamp time before shutdown Switching frequency Unit 220 ms 440 FOSC = FOSCmin tSS Max. 11 ms µs 325 500 675 VIPER222XSTR 27 30 33 VIPER222LSTR 54 60 66 13.5 15 16.5 Minimum switching frequency kHz kHz FD Modulation depth (1) ±7 kHz FM Modulationfrequency (1) 260 Hz DMAX Max. duty cycle (1) VREF E/A reference voltage IPULL UP EA-IN pin current pull-up GM E/A Trans conductance VEA-SAT EA-OUT pin saturation limit VEA-BM Burstmode threshold RDYN Dynamic resistance HEA-OUT ΔVEA-OUT / ΔID IEA-OUT EA-OUT pin source / sink current TSD Thermal shutdown temperature 70 1.175 (1) VEA-OUT =2.7V VEA-IN =GND (1) (1) 1.2 % 1.225 V -1 µA 0.5 mA/V 3 V 0.8 V 65 kΩ 3.8 150 80 7 V/A 100 µA 160 °C 1. Specification assured by characterization. DS13192 - Rev 2 page 7/20 VIPER222 Typical electrical characteristics 5 Typical electrical characteristics Figure 4. IFIG LIM vs. 4 TJ Figure 5. VREF vs. TJ VREF/(VREF@25°C) ILIM/(ILIM@25°C) 1.15 1.01 1.1 1.005 1.05 1 1 0.995 0.95 0.99 0.9 -50 -25 0 25 50 75 100 125 -50 150 -25 0 25 50 75 100 125 150 100 125 150 Tj(°C) Tj(°C) Figure 6. ICC0 vs. TJ Figure 7. ICC1 vs. TJ ICC0/(ICC0@25°C) ICC1/(ICC1@25°C) 1.5 1.2 1.3 1.1 1.1 1 0.9 0.9 0.7 0.8 -50 -25 0 25 50 75 100 125 150 -50 -25 0 Tj(°C) 25 50 75 Tj(°C) Figure 9. VBVDSS vs. Tj Figure 8. RDS(on) vs. TJ RDS(on)/(RDS(on)@25°C) 1.2 VBVDSS/(VBVDSS@25°C) 2.5 2 1.1 1.5 1 1 0.5 0 -50 -25 0 25 50 Tj(°C) DS13192 - Rev 2 75 100 125 150 0.9 -50 0 50 100 150 Tj(°C) page 8/20 VIPER222 General description 6 General description VIPER222 is a 730 V high voltage converter optimized for flyback and buck topologies that operates at 60 kHz (L type) or 30 kHz (X type) switching frequency and integrates the jittering feature in order to reduce the EMI level. The low IC consumption combined with the burst mode technique allow to obtain very low input power at no load and very good efficiency at light load. 6.1 Startup At the first startup the integrated high voltage current source charges the VCC capacitor. At the beginning of startup, when the capacitor is fully discharged, the charging current is low, ICH1, in order to avoid IC damaging in case VCC is accidentally shorted to GND. As VCC exceeds 1 V, ICH1 is increased to ICH2 in order to speed up the charging. The charge current is stopped as soon as VCC reaches VON. As soon as the VCC capacitor is charged up to VON, the high voltage current source is disabled, the device is powered by the energy stored in the capacitor and the primary MOSFET starts switching. The internal soft-start function of the device progressively increases the cycle-by-cycle current limitation set point from zero up to ILIM in 8 steps. The soft-start time, tSS, is internally set at 8 ms. This function is activated at any attempt of converter startup and at any restart after a fault event. 6.2 Feedback loop The device operates in current mode, so the primary current is internally sensed and converted in voltage that is applied to the non-inverting pin of the PWM comparator. The sensed voltage is compared through a voltage divider and on cycle-by-cycle basis with the one present on the EA-IN pin. The OCP comparator works in parallel with the PWM comparator and it limits the primary current below the ILIM threshold. There are two ways to close the loop and get the output regulated: through resistor divider or through external error amplifier plus optocoupler Resistor divider For non-isolated topologies (fly-back, buck or buck-boost converters) the output voltage can be directly set connecting a resistor divider (referenced to GND pin) between the converter output and the EA-IN pin, which is the inverting input of the integrated error amplifier (EA). Primary side regulation can be realized connecting the resistor divider between VCC, EA-IN and GND pins. The loop compensation network is connected across EA-OUT and GND pins. External error amplifier plus optocoupler In case of isolated fly-back, EA-IN must be connected to GND, which disables the internal error amplifier, and the output voltage is set through an external error amplifier (TL431 or similar) placed on the secondary side. Its error signal, reported to the primary through an optocoupler, is used to set the EA-OUT pin voltage to the value corresponding to the DRAIN peak current required by the control loop to deliver the given output power. The EA-OUT pin dynamics range between the values VEA-BM and VEA-SAT: below the VEA-BM level the device enters burst mode; above the VEA-SAT level, the primary drain current reaches its limit ILIM. 6.3 Pulse skipping The protection is intended to avoid the so called “flux-runaway” condition often present at converter startup, because of the low output voltage, and due to the fact that the primary MOSFET, cannot be turned off before the minimum on-time. During the on-time, the inductor is charged by the input voltage and if it cannot be discharged by the same amount during the off-time, in every switching cycle there is a net increase of the average inductor current, that can reach dangerously high values. DS13192 - Rev 2 page 9/20 VIPER222 Burst mode at light load Thanks to this protection, each time the DRAIN peak current exceeds ILIM level within tON_MIN, one switching cycle is skipped. The cycles can be skipped until the minimum switching frequency FOSCmin (15 kHz typ.) is reached. Each time the DRAIN peak current does not exceed ILIM within tON_MIN, one switching cycle is restored. The cycles can be restored until the nominal switching frequency is reached, FOSC (30 or 60 kHz). 6.4 Burst mode at light load When the load decreases, the feedback loop reacts lowering the EA-OUT pin voltage. If it goes below the VEA-BM threshold, the DRAIN peak current is reduced to ILIM_BM, avoiding audible noise which could arise from low switching frequency. When the load is increased, VEA_OUT increases. As it reaches the VEA_SAT threshold, the DRAIN peak current reaches its maximum value, ILIM. 6.5 Short-circuit protection In case of overload or short-circuit on the output, the IC runs at ILIM. If this condition is removed before 50ms, the IC continues its normal operation. If this condition lasts for tOVL (50ms, typ.), the protection is tripped, the device stops switching for tRESTART (1 sec. typ.), then resumes switching with soft-start phase. If the fault is still present, after tOVL, the IC is disabled again for tRESTART; otherwise it resumes normal operation. If the converter is definitively operated at FOSC_MIN, (see Section 6.3 ), the overload time will increase to tOVL_MAX (100 ms typ. for VIPER222XSTR; 200 ms typ. for VIPER222LSTR). During the fault event, the VCC voltage is maintained between VCCL (4.25 V) and VON (16 V) by the periodical activation of the high voltage current source. 6.6 VCC clamp protection If VCC reaches the clamp level VCLAMP and the current injected into the pin exceeds the internal threshold ICC_FAIL for more than tCC_FAIL, a fault condition is detected. The PWM is disabled for tRESTART and then activated again in soft-start phase. The protection is disabled during the soft-start time. DS13192 - Rev 2 page 10/20 VIPER222 Basic application schematics 7 Basic application schematics Figure 10. Non isolated flyback converter Figure 11. Primary side flyback converter DS13192 - Rev 2 page 11/20 VIPER222 Basic application schematics Figure 12. Isolated flyback converter Figure 13. Buck converter Figure 14. Buck-Boost converter ~ AC Din Rin Daux VIPer222 VCC DRAIN R1 EA-IN CONTROL C2 Cvcc EA-OUT Cin Cea_out2 GND R2 D2 Cea_out1 Rea_out1 Vout (< 0V) Dout Lout Cout GROUND DS13192 - Rev 2 page 12/20 VIPER222 Package information 8 Package information 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. 8.1 SSOP10 package information Figure 15. SSOP10 package outline DS13192 - Rev 2 page 13/20 VIPER222 SSOP10 package information Table 6. SSO10 mechanical data Dim. mm Min. Typ. A Max. 1.75 A1 0.10 A2 1.25 b 0.31 0.51 c 0.17 0.25 D 4.80 4.90 5 E 5.80 6 6.20 E1 3.80 3.90 4 e 0.25 1 H 0.25 0.50 L 0.40 0.90 K 0° 8° Figure 16. SSOP10 recommended footprint DS13192 - Rev 2 page 14/20 VIPER222 SSOP10 package information Table 7. Ordering information Order code DS13192 - Rev 2 Package Packaging VIPER222XSTR SSOP10 Tape & Reel VIPER222LSTR SSOP10 Tape & Reel page 15/20 VIPER222 Revision history Table 8. Document revision history DS13192 - Rev 2 Date Version Changes 20-Dec-2019 1 Initial release. 17-Jan-2020 2 Changed min value ILIM parameter in Table 5 page 16/20 VIPER222 Contents Contents 1 Pin setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 2 Typical power capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 Electrical and thermal ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4 Electrical characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Typical electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 General description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 6.1 Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6.2 Feedback loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6.3 Pulse skipping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6.4 Burst mode at light load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6.5 Short-circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6.6 VCC clamp protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7 Basic application schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 8 Package information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 8.1 [Package name] package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 List of tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 List of figures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 DS13192 - Rev 2 page 17/20 VIPER222 List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Pin description. . . . . . . . . Typical power . . . . . . . . . Absolute maximum rating . Thermal data. . . . . . . . . . Electrical characteristics . . SSO10 mechanical data . . Ordering information. . . . . Document revision history . DS13192 - Rev 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . 3 . 4 . 4 . 6 14 15 16 page 18/20 VIPER222 List of figures List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. DS13192 - Rev 2 Block diagram . . . . . . . . . . . . . Connection diagram . . . . . . . . . Rth vs. area . . . . . . . . . . . . . . . ILIM vs. TJ . . . . . . . . . . . . . . . . VREF vs. TJ . . . . . . . . . . . . . . . ICC0 vs. TJ . . . . . . . . . . . . . . . . ICC1 vs. TJ . . . . . . . . . . . . . . . . RDS(on) vs. TJ . . . . . . . . . . . . . . VBVDSS vs. Tj . . . . . . . . . . . . . . Non isolated flyback converter . . Primary side flyback converter . . Isolated flyback converter . . . . . Buck converter . . . . . . . . . . . . . Buck-Boost converter . . . . . . . . SSOP10 package outline . . . . . . SSOP10 recommended footprint. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . 2 . 5 . 8 . 8 . 8 . 8 . 8 . 8 11 11 12 12 12 13 14 page 19/20 VIPER222 IMPORTANT NOTICE – PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. For additional information about ST trademarks, please refer to www.st.com/trademarks. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. © 2020 STMicroelectronics – All rights reserved DS13192 - Rev 2 page 20/20