器件名称: FZL4146
功能描述: Quad Driver Incl. Short-Circuit Signaling
文件大小: 408.57KB 共14页
简 介:Quad Driver Incl. Short-Circuit Signaling
FZL 4146
Bipolar IC Features
q q q
Short-circuit signaling Four driver circuits for driving power transistors Turn-ON threshold setting from 1.5 to 7 V
P-DSO-20-7
Type FZL 4146 G General Description
Ordering Code Q67000-H8743
Package P-DSO-20-7 (SMD)
The IC comprises four driver circuits capable of driving power transistors (PNP or PMOS). The output transistors are protected against short-circuit to ground and supply voltage. The turn-ON threshold can be set from 1.5 V to 7 V. Overload at one or several outputs will be indicated at pin SQ (signaling output). The corresponding power transistors are then protected by changeover to clock-governed operation. Circuit Description Each driver circuit has one active high driver input Dl and a common enable input ENA (active high) is provided for all stages. The Q output is designed to drive the output transistors. The load current is sampled and, if necessary, limited via pin W. If the load current exceeds the preset value, the output stage switches off. Switching-ON again is provided by the built-in clock generator T. Its operation requires an external capacitor Ce at pin CE. If Ce is bridged by a break-key, switching-ON can only be carried out by operating this key. The duty cycle of the clock generator is 1:47 (e.g. 45 s/2.1 ms with Ce = 10 nF). The clock generator is privileged versus the current sensor shut down. When the supply is connected, the internal RS-FF goes into the stat……
