Unless otherwise noted, measurements taken on the TPS23881 EVM and Sifos PSA-3000 PowerSync
Analyzer with PSA3202 test cards. Test conditions are TJ = 25 °C,
VVDD = 3.3 V, VVPWR = 54 V, VDGND =
VAGND, DGND, KSENSA, KSENSB, KSENSC and KSENSD connected to AGND, and
all outputs are unloaded, 2xFBn = 0. Positive currents are into pins.
RS = 0.200 Ω, to KSENSA
(SEN1 or SEN2), to KSENSB (SEN3 or SEN4), to KSENSC (SEN5 or SEN6) or to KSENSD
(SEN7 or SEN8). All voltages are with respect to AGND unless otherwise noted.
Operating registers loaded with default values unless otherwise noted.
Figure 10-4 2-Pair
ILIM Foldback and Turn-Off Figure 10-6 4-Pair ILIM Foldback and Turn Off Figure 10-8 4-Pair Backoff Due to 4PPCut Fault Figure 10-10 2-Pair Open
Circuit Detection Signature Figure 10-12 4-Pair Low Resistance (11kΩ) Detection Signature Figure 10-14 2-Pair Semiauto
Mode Discovery with a Valid Class 0-3 Load Figure 10-16 2-Pair 3-Finger
Classification and Turn-On Figure 10-18 4-Pair Single Signature Discovery and Turn On from Semi-Auto Mode Figure 10-20 4-Pair Single Signature 3-Finger Classification and Turn On Figure 10-22 4-Pair Single Signature 5-Finger Classification and Turn On Figure 10-24 4-Pair Dual Signature Discovery and Turn On from Semi-Auto Mode Figure 10-26 4-Pair Dual Signature 3-Finger Classification and Turn On Figure 10-5 2-Pair Backoff
Due to PCut Fault Figure 10-7 4-Pair Backoff Due to ILIM Fault Figure 10-9 4-Pair Single Signature Class 0-4 Disconnect Figure 10-11 4-Pair Open Circuit Detection Signature Figure 10-13 4-Pair High Resistance (36kΩ) Detection Signature Figure 10-15 2-Pair 1-Finger
Classification and Turn-On Figure 10-17 4-Pair Semi-Auto Mode Discovery with a Valid Single Signature Class 0-3
Load Figure 10-19 4-Pair Single Signature 1-Finger Classification and Turn On Figure 10-21 4-Pair Single Signature 4-Finger Classification and Turn On Figure 10-23 4-Pair Semi-Auto Mode Discovery with a Valid Dual Signature Class 4D
Load Figure 10-25 4-Pair Dual Signature 1-Finger Classification and Turn On Figure 10-27 4-Pair Dual Signature 4-Finger Classification and Turn On