FZL4146G ,Function and Industrial ICsFZL 4146Quad Driver Incl. Short-Circuit SignalingBipolar IC
FZL4146G ,Function and Industrial ICsFeatures● Short-circuit signaling● Four driver circuits for driving power transistors● Turn-ON thre ..
FZL4146G ,Function and Industrial ICsFeatures● Short-circuit signaling● Four driver circuits for driving power transistors● Turn-ON thre ..
FZL4146G ,Function and Industrial ICsFZL 4146Quad Driver Incl. Short-Circuit SignalingBipolar IC
FZL4146G .. ,Function and Industrial ICsFeatures● Short-circuit signaling● Four driver circuits for driving power transistors● Turn-ON thre ..
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FZL4146G-FZL4146G ..
Function and Industrial ICs
SHIEMIENS
Quad Driver Incl. Short-Circuit Signaling FZL 4146
Bipolar IC
Features
0 Short-circuit signaling
0 Four driver circuits for driving power transistors
o Turn-ON threshold setting from 1.5 to 7 V
P-DSO-20-7
Type Ordering Code Package
FZL 4146 G Q67000-H8743 P-DSO-20-7 (SMD)
General Description
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 DI 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 Cl, 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 us/2.1 ms with
C, = 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 state corresponding to
the released output.
Semiconductor Group 1 03.96
SIEMENS FZL 4146
The turn-ON threshold at input DI and ENA can be set via pin TS from 1.5 to 7 V.
' = O V... 1.5 V Turn-ON threshold = 1.5 V
VTS = 1.5 V... 7 V Turn-ON threshold = VTS
' = VS Turn-ON threshold = 7 V
Inputs DI, ENA and W are proof against line break, i.e. an open input at DI or ENA
corresponds to input L, open input W corresponds to overcurrent. If input TS is open, the
highest turn-ON threshold is provided.
The internal current supply B and the undervoltage monitor UV ensure that in case of a
supply voltage that is below the k, turn-OFF threshold, outputs Q and SQ are disabled
and the inputs go high-impedance. Basic functioning is possible within the range from VS
turn-OFF threshold to 4.5 V.
In case of overcurrent or short-circuit to ground at any output stage the signaling output
(SQ) will go low. In clock-governed operation (i.e. when there is automatic switching-ON
by the clock and not by a key), SQ goes high and low at the clock rate as long as a short-
circuit or overload is present. SQ is an open-collector output.
Any input and output is ESD proof within the limit values.
Semiconductor Group 2
