AN2795 Application note VNI4140K load test report Introduction The tests described in this application note were carried out to check the VNI4140K parameters and driving capabilities of different types of problematic loads such as bulb and inductor. The VNI4140K device is a quad high-side smart power state relay intended for driving four independent resistive or inductive loads with built-in current limitation and thermal shutdown. Figure 1 shows the test configuration. The STEVAL-IFP006V1, based on the VNI4140K, was chosen for the measurements. The parameters of the test were set as follows: Power supply: 1. 10.5 V; 2. 24 V; 3. 36 V Generator: freq. = 1 Hz, duty cycle = 50% Load: 1. bulb 24 V/15 W; 2. inductor 130 mH/48 Ω; 3. short-circuit. Figure 1.Test block diagram 9&& 67(9$/,)39 ,1Ć ,1Ć 287Ć /2$'Ć 287Ć /2$'Ć 91, 287 32:(5Ć 6833/< *1' *(1(5$725 ,1Ć 287Ć /2$'Ć 287 ,1Ć 287Ć /2$'Ć *1' *1' $0 March 2013 DocID14836 Rev 2 1/28 www.st.com Contents AN2795 Contents 1 2 3 Bulb load tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Bulb, 10.5 V, 1 channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 Bulb, 10.5 V, 4 channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.3 Bulb, 24 V, 1 channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.4 Bulb, 24 V, 4 channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.5 Bulb, 36 V, 1 channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.6 Bulb, 36 V, 4 channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Inductive load tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.1 Inductor, 10.5 V, 1 channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.2 Inductor, 10.5 V, 4 channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 2.3 Inductor, 24 V, 1 channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.4 Inductor, 24 V, 4 channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2.5 Inductor, 36 V, 1 channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2.6 Inductor, 36 V, 4 channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Short-circuit tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 3.1 Short-circuit, 10.5 V, 1 channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 3.2 Short-circuit, 10.5 V, 4 channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3.3 Short-circuit, 24 V, 1 channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 3.4 Short-circuit, 24 V, 4 channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 3.5 Short-circuit, 36 V, 1 channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 3.6 Short-circuit, 36 V, 4 channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 4 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 5 Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 2/28 DocID14836 Rev 2 AN2795 Bulb load tests 1 Bulb load tests 1.1 Bulb, 10.5 V, 1 channel Table 1. Test data (bulb, 10.5 V, 1 channel) (VCC = 10.5 V; load - 1 bulb; T = 25 °C) Time [min] Utot [V] Itot [A] Uch [V] Ich [A] Tcase [°C] 5 10.4 0.381 10.3 0.376 25.1 15 10.4 0.383 10.3 0.377 25.6 30 10.4 0.382 10.4 0.376 26.0 60 10.4 0.382 10.4 0.377 26.1 Figure 2. Switching waveform (bulb, 10.5 V, 1 channel)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. DocID14836 Rev 2 3/28 Bulb load tests 1.2 AN2795 Bulb, 10.5 V, 4 channels Table 2. Test data (bulb, 10.5 V, 4 channels) (VCC = 10.5 V; load - 4 bulbs; T = 25 °C) Time [min] Utot [V] Itot [A] Uch [V] Ich [A] Tcase [°C] 5 10.3 1.405 9.9 0.365 25.9 15 10.3 1.408 10.0 0.365 26.6 30 10.3 1.409 10.0 0.366 27.0 60 10.3 1.408 10.0 0.366 27.2 Figure 3. Switching waveform (bulb, 10.5 V, 4 channels)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. 4/28 DocID14836 Rev 2 AN2795 1.3 Bulb load tests Bulb, 24 V, 1 channel Table 3. Test data (bulb, 24 V, 1 channel) (VCC = 24 V; load - 1 bulb; T = 25 °C) Time [min] Utot [V] Itot [A] Uch [V] Ich [A] Tcase [°C] 5 23.9 0.629 23.8 0.617 36.6 15 23.9 0.629 23.8 0.617 38.4 30 23.9 0.628 23.7 0.616 38.8 60 23.9 0.628 23.7 0.616 38.8 Figure 4. Switching waveform (bulb, 24 V, 1 channel)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. DocID14836 Rev 2 5/28 Bulb load tests 1.4 AN2795 Bulb, 24 V, 4 channels Table 4. Test data (bulb, 24 V, 4 channels) (VCC = 24 V; load - 4 bulbs; T = 25 °C) Time [min] Utot [V] Itot [A] Uch [V] Ich [A] Tcase [°C] 5 23.6 2.301 23.2 0.600 46.5 15 23.6 2.306 23.2 0.599 48.8 30 23.6 2.307 23.2 0.599 50.8 60 23.6 2.306 23.2 0.599 51.1 Figure 5. Switching waveform (bulb, 24 V, 4 channels)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. 6/28 DocID14836 Rev 2 AN2795 1.5 Bulb load tests Bulb, 36 V, 1 channel Table 5. Test data (bulb, 36 V, 1 channel) (VCC = 36 V; load - 1 bulb; T = 25 °C) Time [min] Utot [V] Itot [A] Uch [V] Ich [A] Tcase [°C] 5 35.8 0.767 33.8 0.751 74.9 15 35.9 0.769 33.8 0.752 79.1 30 35.9 0.769 33.8 0.753 80.8 60 35.9 0.769 33.9 0.753 80.8 Figure 6. Switching waveform (bulb, 36 V, 1 channel)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. DocID14836 Rev 2 7/28 Bulb load tests 1.6 AN2795 Bulb, 36 V, 4 channels Table 6. Test data (bulb, 36 V, 4 channels) (VCC = 36 V; load - 4 bulbs; T = 25 °C) Time [min] Utot [V] Itot [A] Uch [V] Ich [A] Tcase [°C] 5 35.5 2.891 34.2 0.748 105.6 15 35.5 2.891 34.2 0.748 110.2 30 (1) 60 (1) 1. Thermal shutdown activated (thermal cycling). Figure 7. Switching waveform (bulb, 36 V, 4 channels)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. 8/28 DocID14836 Rev 2 AN2795 Inductive load tests 2 Inductive load tests 2.1 Inductor, 10.5 V, 1 channel Table 7. Test data (inductor, 10.5 V, 1 channel) (VCC = 10.5 V; load - 1 inductor; T = 25 °C) Time [min] Utot [V] Itot [A] Uch [V] Ich [A] Tcase [°C] 5 10.5 0.211 10.4 0.209 24.9 15 10.5 0.210 10.4 0.208 25.1 30 10.5 0.210 10.4 0.208 25.2 60 10.5 0.210 10.4 0.208 25.3 Figure 8. Switching waveform (inductor, 10.5 V, 1 channel)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. DocID14836 Rev 2 9/28 Inductive load tests AN2795 Figure 9. Switching waveform (inductor, 10.5 V, 1 channel, turn-off detail)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. 10/28 DocID14836 Rev 2 AN2795 2.2 Inductive load tests Inductor, 10.5 V, 4 channels Table 8. Test data (inductor, 10.5 V, 4 channels) (VCC = 10.5 V; load - 4 inductors; T = 25 °C) Time [min] Utot [V] Itot [A] Uch [V] Ich [A] Tcase [°C] 5 10.4 0.822 10.2 0.204 25.6 15 10.4 0.820 10.2 0.204 26.0 30 10.4 0.819 10.2 0.203 26.3 60 10.4 0.819 10.2 0.204 26.7 Figure 10. Switching waveform (inductor, 10.5 V, 4 channels)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. DocID14836 Rev 2 11/28 Inductive load tests AN2795 Figure 11. Switching waveform (inductor, 10.5 V, 4 channels, turn-off detail)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. 12/28 DocID14836 Rev 2 AN2795 2.3 Inductive load tests Inductor, 24 V, 1 channel Table 9. Test data (inductor, 24 V, 1 channel) (VCC = 24 V; load - 1 inductor; T = 25 °C) Time [min] Utot [V] Itot A] Uch [V] Ich [A] Tcase [°C] 5 23.9 0.422 23.8 0.420 25.8 15 23.9 0.429 23.8 0.426 26.2 30 23.9 0.430 23.8 0.427 26.5 60 23.9 0.430 23.8 0.427 26.7 Figure 12. Switching waveform (inductor, 24 V, 1 channel)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. DocID14836 Rev 2 13/28 Inductive load tests AN2795 Figure 13. Switching waveform (inductor, 24 V, 1 channel, turn-off detail)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. 14/28 DocID14836 Rev 2 AN2795 2.4 Inductive load tests Inductor, 24 V, 4 channels Table 10. Test data (inductor, 24 V, 4 channels) (VCC = 24 V; load - 4 inductors; T = 25 °C) Time [min] Utot [V] Itot [A] Uch [V] Ich [A] Tcase [°C] 5 23.8 1.690 23.5 0.423 30.6 15 23.8 1.655 23.5 0.418 31.9 30 23.8 1.659 23.5 0.420 32.3 60 23.8 1.658 23.5 0.420 32.5 Figure 14. Switching waveform (inductor, 24 V, 4 channels)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. DocID14836 Rev 2 15/28 Inductive load tests AN2795 Figure 15. Switching waveform (inductor, 24 V, 4 channels, turn-off detail)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. 16/28 DocID14836 Rev 2 AN2795 2.5 Inductive load tests Inductor, 36 V, 1 channel Table 11. Test data (inductor, 36 V, 1 channel) (VCC = 36 V; load - 1 inductor; T = 25 °C) Time [min] Utot [V] Itot [A] Uch [V] Ich [A] Tcase [°C] 5 35.9 0.578 35.8 0.572 28.0 15 35.9 0.572 35.8 0.565 28.5 30 35.9 0.572 35.8 0.566 28.7 60 35.9 0.573 35.8 0.568 28.8 Figure 16. Switching waveform (inductor, 36 V, 1 channel)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. DocID14836 Rev 2 17/28 Inductive load tests AN2795 Figure 17. Switching waveform (inductor, 36 V, 1 channel, turn-off detail)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. 18/28 DocID14836 Rev 2 AN2795 2.6 Inductive load tests Inductor, 36 V, 4 channels Table 12. Test data (inductor, 36 V, 4 channels) (VCC = 36 V; load - 4 inductors; T = 25 °C) Time [min] Utot [V] Itot [A] Uch [V] Ich [A] Tcase [°C] 5 35.7 1.250 35.3 0.566 36.5 15 35.7 1.183 35.3 0.556 38.1 30 35.7 1.185 35.3 0.555 38.6 60 35.7 1.186 35.3 0.555 38.8 Figure 18. Switching waveform (inductor, 36 V, 4 channels)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. DocID14836 Rev 2 19/28 Inductive load tests AN2795 Figure 19. Switching waveform (inductor, 36 V, 4 channels, turn-off detail)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. 20/28 DocID14836 Rev 2 AN2795 Short-circuit tests 3 Short-circuit tests 3.1 Short-circuit, 10.5 V, 1 channel Table 13. Test data (short-circuit, 10.5 V, 1 channel) (VCC = 10.5 V; load - 1 short-circuit; T = 25 °C) Time [min] Utot [V] Itot [A] Uch [V] Ich [A] Tcase [°C] 5 9.7 1.025 0.0 1.019 111.3 15 9.7 1.028 0.0 1.022 112.6 30 9.7 1.026 0.0 1.020 112.9 60 9.7 1.026 0.0 1.020 113.1 Figure 20. Switching waveform (short-circuit, 10.5 V, 1 channel)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. DocID14836 Rev 2 21/28 Short-circuit tests 3.2 AN2795 Short-circuit, 10.5 V, 4 channels Table 14. Test data (short-circuit, 10.5 V, 4 channels) (VCC = 10.5V; load - 4 shortcircuits; T = 25 °C) Time [min] Utot [V] Itot [A] Uch [V] Ich [A] Tcase [°C] 5 9.3 4.102 0.0 1.024 103.1 15 9.3 4.104 0.0 1.025 103.5 30 9.3 4.103 0.0 1.024 103.8 60 9.3 4.105 0.0 1.025 103.9 Figure 21. Switching waveform (short-circuit, 10.5 V, 4 channels)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. 22/28 DocID14836 Rev 2 AN2795 3.3 Short-circuit tests Short-circuit, 24 V, 1 channel Table 15. Test data (short-circuit, 24 V, 1 channel) (VCC = 24 V; load - 1 short-circuit; T = 25 °C) Time [min] Utot [V] Itot [A] Uch [V] Ich [A] Tcase [°C] 5 23.3 0.964 0.0 0.958 109.1 15 23.3 0.965 0.0 0.959 109.4 30 23.3 0.965 0.0 0.959 109.6 60 23.3 0.967 0.0 0.961 109.7 Figure 22. Switching waveform (short-circuit, 24 V, 1 channel)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. DocID14836 Rev 2 23/28 Short-circuit tests 3.4 AN2795 Short-circuit, 24 V, 4 channels Table 16. Test data (short-circuit, 24 V, 4 channels) (VCC = 24 V; load - 4 short-circuits; T = 25 °C) Time [min] Utot [V] Itot [A] Uch [V] Ich [A] Tcase [°C] 5 23.3 2.512 0.0 0.627 102.3 15 23.3 2.511 0.0 0.626 102.4 30 23.3 2.513 0.0 0.627 102.5 60 23.3 2.514 0.0 0.627 102.5 Figure 23. Switching waveform (short-circuit, 24 V, 4 channels)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. 24/28 DocID14836 Rev 2 AN2795 3.5 Short-circuit tests Short-circuit, 36 V, 1 channel Table 17. Test data (short-circuit, 36 V, 1 channel) (VCC = 36V; load - 1 short-circuit; T = 25 °C) Time [min] Utot [V] Itot [A] Uch [V] Ich [A] Tcase [°C] 5 35.5 0.652 0.0 0.646 108.4 15 35.5 0.653 0.0 0.647 109.2 30 35.5 0.653 0.0 0.647 109.8 60 35.5 0.655 0.0 0.649 110.2 Figure 24. Switching waveform (short-circuit, 36 V, 1 channel)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. DocID14836 Rev 2 25/28 Short-circuit tests 3.6 AN2795 Short-circuit, 36 V, 4 channels Table 18. Test data (short-circuit, 36 V, 4 channels) (VCC = 36 V; load - 4 short-circuits; T = 25 °C) Time [min] Utot [V] Itot [A] Uch [V] Ich [A] Tcase [°C] 5 35.5 1.720 0.0 0.429 101.0 15 35.5 1.722 0.0 0.429 101.1 30 35.5 1.724 0.0 0.430 101.2 60 35.5 1.725 0.0 0.430 101.2 Figure 25. Switching waveform (short-circuit, 36 V, 4 channels)(1) 1. CH1: supply current, CH2: channel voltage, CH3: channel current, CH4: supply voltage. 26/28 DocID14836 Rev 2 AN2795 4 Conclusion Conclusion The device proved its full compliance and functionality under these more difficult conditions. 5 6 Reference 1. VNI4140K datasheet. 2. AN2684 application note. Revision history Table 19. Document revision history Date Revision Changes 09-Feb-2011 1 Initial release. 18-Mar-2013 2 Updated Section 4: Conclusion. 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