UC3845A
FEATURES
Figure 1. Package
- TRIMMED OSCILLATOR DISCHARGE
CURRENT
- CURRENT MODE OPERATION TO 500k Hz
AUTOMATIC FEED FORWARD PENSATION
DIP-8
SO-8
- LATCHING PWM FOR CYCLE-BY-CYCLE CURRENT LIMITING
Table 1. Order Codes
- INTERNALLY TRIMMED REFERENCE WITH
Part Number
Package
UNDERVOLTAGE LOCKOUT
- HIGH CURRENT TOTEM POLE OUTPUT t(s)UNDERVOLTAGE LOCKOUT WITH
HYSTERESIS c- LOW START-UP CURRENT (< 0.5m A) u DOUBLE PULSE SUPPRESSION rod2 DESCRIPTION
PThe UC384x A family of control ICs provides the necessary features to implement off-line or DC to te DC fixed frequency current mode control schemes lewith a minimal external parts count. Internally imoplemented circuits include a trimmed oscillator for sprecise DUTY CYCLE CONTROL under voltage blockout featuring start-up current less than 0.5m A, Oa precision reference trimmed for accuracy at the -error amp input, logic to insure latched operation, )a PWM parator which also provides current t(slimit control, and a totem pole output...
