Texas Instruments TPSM846C23, Руководство пользователя

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Test Point Descriptions
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4 SLVUB26C – May 2017 – Revised June 2018
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Operating TPSM846C23 in Parallel
3 Test Point Descriptions
Wire-loop test points and scope probe test points are provided as convenient connection points for digital
voltmeters (DVM) or oscilloscope probes to aid in the evaluation of the device. A description of each test
point follows:
Table 1. Test Points
VIN Input voltage monitor. Connect DVM to this point for measuring efficiency.
VS+ Supply path output voltage monitor. Connect DVM positive lead to this point for line regulation and load
regulation.
VS– Return path output voltage monitor. Connect DVM negative lead to this point for measuring line regulation
and load regulation.
VOUT Output voltage monitor. Connect DVM to this point and PGND for measuring efficiency.
PGND Input and output voltage monitor grounds. Reference the VIN and VOUT DVMs to these ground points.
VIN MON (J1) Input voltage scope monitor. Connect an oscilloscope to this set of points to measure input ripple voltage.
VOUT MON (J2) Output voltage scope monitor. Connect an oscilloscope to this set of points to measure output ripple voltage
and transient response.
AGND Analog ground point. Use any of the AGND test points as the ground reference for the control signals.
ALERT PMBus ALERT line, used to monitor the ALERT signal.
CLK PMBus CLK line, used to monitor the CLK signal.
DATA PMBus DATA line, used to monitor the DATA signal.
CNTL Control pin. Pull to AGND to stop power conversion. Float or pull to 3.3 V to enable power conversion. An
internal 10-k
Ω
pullup resistor to 3.3 V is present on the EVM.
EXT CLK External clock input. This is the input to a D flip-flop. Apply an external clock at a frequency that is twice the
required switching frequency. Remove R13 before applying the clock signal.
SYNC SYNC monitor pin. This pin is the output of a D flip-flop which supplies a clock to both devices.
PGOOD Monitors the power good signal of the device. This is an open drain signal that has an on-board 10-k
Ω
pullup
resistor the 3.3 V.
DIFFO Output of remote sense differential amplifier.
Signal Signal injection point for Bode plot analyzer. Inject from Signal to CHB.
CHA Input signal monitoring point for Bode plot analyzer.
CHB Output signal monitoring point for Bode plot analyzer.
PH1 Switch node of the TPSM846C23 Master device (U1). Use an unshielded scope probe to monitor this point.
PH2 Switch node of the TPSM846C23 Slave device (U2). Use an unshielded scope probe to monitor this point.
NOTE: Refer to the product data sheet ( SLVSDF3 ) for absolute maximum ratings associated with
features in Table 1 .