SLVU251 User guide

SLVU251B June 2008 – February 2022 TPS51220

5.3 Current-Sensing Selection

The current-sensing scheme can be set by the external current sensing devices, using some resistors on the EVM.

Default setting is Inductor DCR sensing

Table 5-3 Current-Sensing Scheme Selection (CH1)

	R8	R29	R35	R36	R6	R7	R25
Inductor DCR	Put on⁽¹⁾	Put on⁽¹⁾ (if necessary)	Put on⁽¹⁾	Put on⁽¹⁾	Open	Open	Open
External Resistor	Put on⁽¹⁾	Put on⁽¹⁾ (if necessary)	Put on⁽¹⁾	Open	Put on ⁽¹⁾ Cut trace	Open	Open

(1) "Put on” means add appropriate resistor.

Table 5-4 Current Sensing Scheme Selection (CH2)

	R18	R28	R33	R37	R20	R19	R26
Inductor DCR	Put on⁽¹⁾	Put on⁽¹⁾ (if necessary)	Put on⁽¹⁾	Put on⁽¹⁾	Open	Open	Open
External Resistor	Put on⁽¹⁾	Put on⁽¹⁾ (if necessary)	Put on⁽¹⁾	Open	Put on ⁽¹⁾ Cut trace	Open	Open

(1) "Put on” means add appropriate resistor.

For external resistor sensing, cut the trace as follows.

Figure 5-1 (CH1) Cut Trace Underneath R6

Figure 5-2 (CH2) Cut Trace Underneath R20