Datasheet SRK1001 (STMicroelectronics) - 6
| 制造商 | STMicroelectronics |
| 描述 | Adaptive synchronous rectification controller for flyback converter |
| 页数 / 页 | 27 / 6 — SRK1001. Electrical characteristics. Table 4. Electrical characteristics. … |
| 文件格式/大小 | PDF / 615 Kb |
| 文件语言 | 英语 |
SRK1001. Electrical characteristics. Table 4. Electrical characteristics. Symbol. Parameter. Test Condition. Min. Typ. Max. Unit
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SRK1001 Electrical characteristics 4 Electrical characteristics
Tj = -25°C to 125°C, VCC = 12 V, CGD = 4.7 nF; unless otherwise specified, typical values refer to Tj = 25°C
Table 4. Electrical characteristics Symbol Parameter Test Condition Min. Typ. Max. Unit Supply section
VAUX VAUX pin operating voltage 185 V VCC Operating voltage range After turn-on 3.7 32 V VCC_On Turn-on supply voltage Voltage rising (1) 4.18 4.3 4.42 V V Turn-on supply voltage for AUX switch CC_SO_On activation Voltage falling (1) 3.7 3.95 4.15 V VCC_Off Turn-off supply voltage Voltage falling (1) 3.3 3.5 3.7 V V V CC voltage above which adaptive drive is CC_AGD_en On V enabled CC rising edge (2) 7.4 V V V CC voltage below which adaptive drive is CC_AGD_dis On V disabled CC falling edge (2) 6.5 V I After turn-on (excluding SR MOS q_run Current consumption in run mode 600 µA gate driving) @ 100 kHz ICC Operating supply current @ 300 kHz 17 mA Low consumption mode operation, Iq Quiescent Current with DVS pin not switching (3), Tj = 170 225 µA -25°C to 85°C Ron VAUX switch resistance (2) 40 Ω IDSAT_VAUX VAUX pin saturation current 125 mA
Drain-source sensing input and synch function
VDS_H DVS operating voltage 185 V VTH_A Cycle comparator threshold 70 100 130 mV VZCD_OFF_MIN Minimum ZCD comparator threshold (2) -20 mV T Body diode residual conduction time after turn- diode_off 230 330 430 ns off TD_On_min Turn-on delay 55 85 105 ns DVS switching T Anticipation time referred to DVS rising edge to ant_timer 180 280 325 ns force turn off of SR MOSFET Low level on DVS pin = -1 V T Timer step every 4 switching cycles (in FF With 100pF on TON pin, during timer_step 56 ns operation) switching period increase TON_MAX Max turn-on duration 45 60 80 µs
Disable pin remote on/off function
For at least 4 cycle to enter in disable state (low consumption mode). VDIS_OFF Disable threshold 1.9 2.1 2.3 V Used also as SYNCH input, it always forces a SR MOSFET turn off when pulled high
DS13155
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Rev 1 page 6/27
Document Outline 1 Block diagram and pin connection 2 Maximum ratings 3 Typical application schematic 4 Electrical characteristics 5 Operation description 5.1 Drain voltage sensing 5.2 Turn-on 5.3 Minimum TON programming 5.4 Adaptive turn-off and TIMER 5.4.1 Fixed frequency mixed DCM/CCM operation 5.4.2 QR operation (with valley skipping) 5.4.3 Fixed frequency DCM operation 5.4.4 Variable frequency CCM operation 5.5 Minimum TOFF programming 5.6 Start-up phase 5.7 Low consumption mode operation: sleep-mode, burst mode, disable state 5.8 DIS/SYNC pin functions 5.9 VAUX pin operation in CC regulation 5.9.1 Example for parameter calculations 5.10 Operation in CC regulation and short circuit 5.11 Adaptive gate drive 6 Layout guidelines 7 Package mechanical data Revision history
SRK1001 Electrical characteristics 4 Electrical characteristics
Tj = -25°C to 125°C, VCC = 12 V, CGD = 4.7 nF; unless otherwise specified, typical values refer to Tj = 25°C
Table 4. Electrical characteristics Symbol Parameter Test Condition Min. Typ. Max. Unit Supply section
VAUX VAUX pin operating voltage 185 V VCC Operating voltage range After turn-on 3.7 32 V VCC_On Turn-on supply voltage Voltage rising (1) 4.18 4.3 4.42 V V Turn-on supply voltage for AUX switch CC_SO_On activation Voltage falling (1) 3.7 3.95 4.15 V VCC_Off Turn-off supply voltage Voltage falling (1) 3.3 3.5 3.7 V V V CC voltage above which adaptive drive is CC_AGD_en On V enabled CC rising edge (2) 7.4 V V V CC voltage below which adaptive drive is CC_AGD_dis On V disabled CC falling edge (2) 6.5 V I After turn-on (excluding SR MOS q_run Current consumption in run mode 600 µA gate driving) @ 100 kHz ICC Operating supply current @ 300 kHz 17 mA Low consumption mode operation, Iq Quiescent Current with DVS pin not switching (3), Tj = 170 225 µA -25°C to 85°C Ron VAUX switch resistance (2) 40 Ω IDSAT_VAUX VAUX pin saturation current 125 mA
Drain-source sensing input and synch function
VDS_H DVS operating voltage 185 V VTH_A Cycle comparator threshold 70 100 130 mV VZCD_OFF_MIN Minimum ZCD comparator threshold (2) -20 mV T Body diode residual conduction time after turn- diode_off 230 330 430 ns off TD_On_min Turn-on delay 55 85 105 ns DVS switching T Anticipation time referred to DVS rising edge to ant_timer 180 280 325 ns force turn off of SR MOSFET Low level on DVS pin = -1 V T Timer step every 4 switching cycles (in FF With 100pF on TON pin, during timer_step 56 ns operation) switching period increase TON_MAX Max turn-on duration 45 60 80 µs
Disable pin remote on/off function
For at least 4 cycle to enter in disable state (low consumption mode). VDIS_OFF Disable threshold 1.9 2.1 2.3 V Used also as SYNCH input, it always forces a SR MOSFET turn off when pulled high
DS13155
-
Rev 1 page 6/27
Document Outline 1 Block diagram and pin connection 2 Maximum ratings 3 Typical application schematic 4 Electrical characteristics 5 Operation description 5.1 Drain voltage sensing 5.2 Turn-on 5.3 Minimum TON programming 5.4 Adaptive turn-off and TIMER 5.4.1 Fixed frequency mixed DCM/CCM operation 5.4.2 QR operation (with valley skipping) 5.4.3 Fixed frequency DCM operation 5.4.4 Variable frequency CCM operation 5.5 Minimum TOFF programming 5.6 Start-up phase 5.7 Low consumption mode operation: sleep-mode, burst mode, disable state 5.8 DIS/SYNC pin functions 5.9 VAUX pin operation in CC regulation 5.9.1 Example for parameter calculations 5.10 Operation in CC regulation and short circuit 5.11 Adaptive gate drive 6 Layout guidelines 7 Package mechanical data Revision history