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ZHCSNL3A December 2021 – November 2023 TPSM8D6C24

PRODUCTION DATA

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机械数据 (封装 | 引脚)

MOW|59

散热焊盘机械数据 (封装 | 引脚)

订购信息

7.2.2.4 Compensation Selection (MSEL1 Pin)

The resistor to AGND for MSEL1 selects the (B1h) USER_DATA_01 (COMPENSATION_CONFIG) values to program the following voltage loop and current loop gains. For options other than the EEPROM code (MSEL1 shorted to AGND or MSEL1 to AGND resistor code 0), the current and voltage loop zero and pole frequencies are scaled with the programmed switching frequency.

Based on Table 7-2, for a switching frequency of 550k kHz, the TPSM8D6C24 should use an I_LOOP of 6 and a maximum voltage loop bandwidth of 87 kHz.

Table 7-2 Recommended ILOOP Settings

f_sw (kHz)	I_LOOP	V_BW(max)
325	3	43
375	4	58
450	5	72
550	6	87
650	7	101
750	8	115
900	8	115
900	10	144
1100	8	115
1100	12	173
1300	15	216
1500	8	115
1500	17	245

In order to achieve the desired transient performance, V_LOOP needs to be selected to satisfy the equation (Equation 10).

Equation 10.

V_{L O O P} > \frac{{ΔV}_{O U T}}{{ΔI}_{O U T}} \times \frac{C S A}{N \times V O U T_S C A L E_L O O P}

For this design, V_LOOP = 4 is selected.

For I_LOOP = 6, V_LOOP = 4, Compensation Code 24 is selected and MSEL1 is terminated with no resistor divider and resistor to ground code 14, selecting a 68.1-kΩ resistor.

Note: More conservative Current and Voltage Loops can be selected by selecting a lower I_LOOP gain and reducing the maximum voltage loop bandwidth proportionally.