SLUS224G September 1994 – July 2022 UC1842A , UC1843A , UC1844A , UC1845A , UC2842A , UC2843A , UC2844A , UC2845A , UC3842A , UC3843A , UC3844A , UC3845A
PRODUCTION DATA
The UCx84xA family of control devices is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5 mA, oscillator discharge is trimmed to 8.3 mA, and during UVLO, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
UC1842A, UC1843A, UC1844A, UC1845A | CDIP (8) | 6.67 mm × 9.60 mm |
LCCC (20) | 8.89 mm × 8.89 mm | |
UC2843A | PLCC (20) | 8.96 mm × 8.96 mm |
UC2842A, UC2843A, UC2844A, UC2845A, UC3842A, UC3843A, UC3844A, UC3845A |
PDIP (8) | 6.35 mm × 9.81 mm |
SOIC (8) | 3.91 mm × 4.90 mm | |
SOIC (14) | 3.91 mm × 8.65 mm | |
SOIC (16) | 7.50 mm × 10.30 mm |
DEVICE | UVLO ON | UVLO OFF | MAX DUTY CYCLE |
---|---|---|---|
UC1842A | 16 V | 10 V | <100% |
UC1843A | 8.4 V | 7.6 V | <100% |
UC1844A | 16 V | 10 V | <50% |
UC1845A | 8.4 V | 7.6 V | <50% |