U2102B.pdf 데이터시트 (총 16 페이지) - 파일 다운로드 U2102B 데이타시트 다운로드

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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)

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U2102B
Power Supply, Synchronization Pins 15 and 16
The voltage limitation circuit contained in the U2102B
enables simple power supply via a dropping resistor R1.
In the case of dc loads, practically all the supply current
flows into Pin 16 (the pull down resistor at Pin 16 is neces-
sary in order to guarantee reliable synchronization) and
is supplied via an internal diode to Pin 15, where the resul-
tant supply voltage is limited and smoothed by C1. As a
result, the rectified and divided line voltage appears at
Pin 16, where the amplitude is limited. The power supply
for the circuit can be realized in all modes for dc loads as
shown in figure 3. The voltage at Pin 16 is used to
synchronize the circuit with the mains and generate the
system clock required for the buffers. The circuit detects
a “zero crossing” when the voltage at Pin 16 falls below
an internal threshold of approximately 8 V.
Sync.
R1=Rsync
16
Vmains
Voltage
limitation
+VS
15
Push
pull
14
Temp.
monit.
GND
13
95 9882
C1
RG
Load
IGBT
Rsh
Figure 3. Power supply for dc loads (R1 is identical with Rsync)
R1 is calculated here as follows:
+R1max
0.85
VNmin –VS
Itot
(1)
where:
VNmin =
Vmains – 15%
VS = Supply voltage
Itot =
ISmax =
Ix =
ISmax + Ix
Max. current consumption of the IC
Current consumption of the external
components
4 (16)
TELEFUNKEN Semiconductors
Rev. A1, 30-May-96

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U2102B
In the case of ac loads, it is necessary to make a distinction
for power supply purposes between the individual
operating modes. In reverse phase control mode, figure 4,
Pin 15 must be additionally supplied with power via a
dropping resistor, since no current flows in Pin 16 when
the power switch is switched on. Here, the dropping
resistor, R1, is connected before the rectifier bridge and
therefore has only one mains half-wave. R1 is then calcu-
lated as follows:
+ @ @R1max
0.85
VNmin –VS
2 Itot
Rsync
D1
Load
Vmains
Sync.
16
R1
Voltage
limitation
+VS
15
Push
pull
14
C1
RG
IGBT
Figure 4.
Power supply in reverse phase
control mode for ac loads
Temp.
monit.
GND
13
95 9883
In two-wire systems, the additional power supply at
Pin 15 is not possible (see figure 4, by omitting R1 and
Diode D1). In this case, the resistor Rsync is identical with
R1 and should be as low as the power dissipation allows
it. A sufficiently large residual phase angle must remain
in this case in order to guarantee the device supply.
Rsh
The power supply is simplified if the device is operated
as a static zero-voltage switch for ac loads (see figure 5).
All delay times are twice as long here, since synchro-
nization of the module is tapped before the rectifier
bridge.
Sync.
R1= Rsync
16
Voltage
limitation
+VS
15
Push
pull
14
Temp.
monit.
GND
13
95 9884
C1
RG
IGBT
Rsh
Load
Vmains
Figure 5.
Power supply as static zero
voltage switch for ac loads
TELEFUNKEN Semiconductors
Rev. A1, 30-May-96
5 (16)