UM1693 datasheet(9/196 Pages) STMICROELECTRONICS

9 / 196 page

DocID025505 Rev 1

9/196

UM1693

List of figures

Figure 92.

Behavior of VSENSE_SAT vs VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Figure 93.

Behavior of ISENSE_SAT vs VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Figure 94.

Failure flag indication-example 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Figure 95.

MultiSense operation of VND7040AJ-E in current monitoring with increasing overload

and consequent device’s latch off due to thermal protection intervention . . . . . . . . . . . . 124

Figure 96.

MultiSense in TCHIP mode behavior versus RSENSE for VND7140AJ-E at VCC = 14 V

and TC = 25 °C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Figure 97.

MultiSense in VCC mode behavior versus RSENSE for VND7140AJ-E at VCC = 14 V

and TC = 25 °C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Figure 98.

Bulb / LED diagnostic example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Figure 99.

Minimum ON time for correct VSENSE sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

Figure 100. Switched current sense resistor–example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Figure 101. Example of single point calibration at low current for VND7020AJ-E . . . . . . . . . . . . . . . . 133

Figure 102. VSENSE vs IOUT measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

Figure 103. RPU calculation with no load connected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Figure 104. RPU calculation with load connected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Figure 105. Analogue HSD – open load detection in off-state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Figure 106. Open load / short to VCC detection in OFF state - delay after IN is set from low to high . 138

Figure 107. Open load/short to VCC detection in OFF state - delay after SEn is set from low to high . 139

Figure 108. Open-load without pull-up timings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Figure 109. Open-load with pull-up timings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Figure 110. Short circuit to VBATT timings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Figure 111. Power limitation or overtemperature waveforms (in autorestart mode) . . . . . . . . . . . . . . 142

Figure 112. Power limitation or overtemperature waveforms (in lacth mode) . . . . . . . . . . . . . . . . . . . 142

Figure 113. eMIOS PWM generation mode principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Figure 114. SPC extended ADC channels block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Figure 115. CSENSE diagnostic approach principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Figure 116. Example of connection of multiple HSDs to SPC using external ADC MUX control. . . . . 145

Figure 117. SPC560Bxx example MultiSense trigger points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Figure 118. Low pass filter connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Figure 119. GND voltage shift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Figure 120. VCC monitor transfer function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Figure 121. Example MultiSense reading on multiple HSDs with GND shift compensation . . . . . . . . 151

Figure 122. GND shift measurement position example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

Figure 123. Direct connection of SEn pins (not recommended) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Figure 124. Proper connection of SEn pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Figure 125. Direct connection of SEn pins (not recommended) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Figure 126. Direct connection of SEn pins (not recommended) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Figure 127. Direct connection of SEn pins (not recommended) during loss of GND . . . . . . . . . . . . . 157

Figure 128. Paralleling of inputs summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

Figure 129. Direct connection of MultiSense pins (not recommended) . . . . . . . . . . . . . . . . . . . . . . . . 158

Figure 130. Safe solution for paralleling MultiSense pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

Figure 131. Direct connection of MultiSense pins (not recommended) . . . . . . . . . . . . . . . . . . . . . . . . 160

Figure 132. Direct connection of MultiSense pins (not recommended) . . . . . . . . . . . . . . . . . . . . . . . 161

Figure 133. Paralleling of MultiSense summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Figure 134. Common GND network with different supply lines (not recommended) . . . . . . . . . . . . . . 162

Figure 135. Test setup – paralleling of outputs (load current sharing). . . . . . . . . . . . . . . . . . . . . . . . . 163

Figure 136. Sharing of load current, VON regulation (VND7020AJ-E) . . . . . . . . . . . . . . . . . . . . . . . . 164

Figure 137. Current sense behavior at low current (VND7020AJ-E) . . . . . . . . . . . . . . . . . . . . . . . . . 164

Figure 138. Sharing of load current, VON regulation (VND7140AJ-E) . . . . . . . . . . . . . . . . . . . . . . . . 164

Figure 139. Current sense behavior at low current (VND7140AJ-E) . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Figure 140. Behavior during overload condition (VND7040AJ-E, Ch.0 + Ch.1) . . . . . . . . . . . . . . . . . 166

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