CS51 CS5102xAG 022A AWLYWW ALYW CS51021A, CS51022A, CS51023A, CS51024A Enhanced Current Mode PWM Controller The CS51021A/2A/3A/4A Fixed Frequency PWM Current Mode Controller family provides all necessary features required for ACDC CS51021A, CS51022A, CS51023A, CS51024A 100 V IN (36 V to 72 V) 51 k BAS21 PGND 1.0 F 18 V 22 F SYNC/SLEEP 11 V 100:1 FZT688 2:5 200 k, 1.0% 10 k 24.3 k, 4:1 10 1.0% V OUT 0.01 F 4700 pF (5 V/5 A) V V C CC 2.49 k, 10 V UV 1.0% 22 k REF 10 k 51 k COMP OV BA521 I V SET FB 100 F 100 F 680 pF R C SLOPE T T IRF6345 SGND GATE SYNC/ I SLEEP SENSE 100 6.98 k, 6.98 k, C PGND SS 330 pF 1.0% 1.0% LGND 62 0.01 F 470 pF 100 p 0.1 F 5.1 k TL431 1000 pF 2.0 k, 1.0% 180 2.0 k, 1.0 k 1.0% MOC81025 10 K 1.0 K Figure 1. Typical Application Diagram, 3672 V to 5.0 V, 5.0 A DCDC Converter MAXIMUM RATINGS* Rating Value Unit Power Supply Voltage, V 0.3, 20 V CC Driver Supply Voltage, V 0.3, 20 V C SYNC, SLEEP, R C , SOFTSTART, V , SLOPE, I , UV, OV, I (Logic Pins) 0.25 to V V T T FB SENSE SET REF Peak GATE Output Current 1.0 A Steady State Output Current 0.2 A Operating Junction Temperature, T 150 C J Storage Temperature Range, T 65 to +150 C S ESD (Human Body Model) 2.0 kV Lead Temperature Soldering: Reflow: (SMD styles only) (Note 1) 230 peak C Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected. *The maximum package power dissipation must be observed. 1. 60 second maximum above 183C.