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<p>L1 VIN 10 SL22 18 V/1.3 A 12V C1 C4 C3 R1 8 4 C2 1 825 Good SUP SW 12 SW 5 FREQ 20 1 VINB FB C15 R2 470 56 Bad 21 3 VINE os 22 23 C16 AVIN GND 16 27 VGL 1 UF C6 EN1 GD GD 9 -5 mA DRP 10 0.47 VGH 0.47 EN2 11 14 mA DRN FBP 13 17 FBN RS C13 03 24 18 R3 REF 0.47 19 Always check C7 6 0.47 NC 7 15 switching PGNO FBB resistor for 28 2 SS COMP R4 25 26 Cb proper Ohm DLY1 DLY2 150 100 nF value. V C17 L2 (LOGIC) C9 C10 C11 22 of 15 3.3 V/2.3 A C8 22nF 10 10 220 nF D6 R7 C14 C12 SL22 2 22 Always use scope and check both +/- R$ Feedback pins as troubleshooting reference. Fig 5AB</p>