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Multifunction Timer
U2102B
Description
The monolithic integrated bipolar circuit U2102B is an
MOSFET or IGBT control circuit which allows
realization of an extremely wide range of timer and
dimmer functions. The integrated current monitoring
function additionally permits the power switch to be
reliably protected without an additional fuse.
Features
D Integrated reverse phase control
D Two- or three-wire applications
D Mode selection:
– Zero-voltage switch with static output
– Two-stage reverse phase control with switch-off
– Two-stage reverse phase control
D Current monitoring:
– High-speed short-circuit monitoring with output
– High-current monitoring with integrating buffer
D Integrated chip temperature monitoring
D Adjustable and retriggerable tracking time
D External window adjustment for sensor input
D Enable input for triggering
Applications
D Motion detectors
D Time-delay relays
D Dimmers
D Reverse phase controls
D Timers
Package: DIP16, SO16
1
VRef
Voltage monitoring
2 Reverse
3 phase
4 control
5
RC oscillator
Divider
6 Programing
Control
logic
16
Synchronization
Voltage limitation
Push
pull
Current monitoring
94 8666
15
13
14
12
11
Triggering with buffers
7 89
TELEFUNKEN Semiconductors
Rev. A1, 30-May-96
Temperature
monitoring
Figure 1. Block diagram
Test logic
10
1 (16)

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U2102B
2 (16)
Figure 2. Block diagram with typical circuit for dc loads
TELEFUNKEN Semiconductors
Rev. A1, 30-May-96

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Pin Description
Pin Symbol
Function
1 VRef Reference voltage 5 V
2 CRamp Ramp, capacitance
3 RRamp Current setting for ramp
4 Control Control voltage
5 Osc RC oscillator
6 Prog. Tri state programing
7 EN Enable-input
8 Trigger Trigger-input (window)
9 V9 Window-adjustment
10 Test Test output
11 II Input current monitoring
12 Ioff Fast output current monitoring
13 GND Ground
14 VO Output voltage
15 + VS Supply voltage
16 Sync Synchronization input
VRef 1
CRamp 2
RRamp 3
Control 4
Osc 5
Prog. 6
EN 7
Trigger 8
U2102B
16 Sync
15 +VS
14 VO
13 GND
12 Ioff
11 II
10 Test
9 V9
94 8619
TELEFUNKEN Semiconductors
Rev. A1, 30-May-96
3 (16)