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U2350B-FP
PWM Speed Control for Permanent Excited DC Motors
Description
The monolithic integrated bipolar circuit U2350B is a MOSFET or IGBT - control circuit which works on the principle of pulse width modulation (PWM). The overall concept enables the construction of a power controller with mains voltage compensation where intermittent operation is also possible. In addition, the circuit also enables mains-voltage compensated current control, which maintains the power supplied at a constant level after the preset threshold has been exceeded.
Features
D D D D D D D D
Pulse width control up to 30 kHz clock frequency Mains supply compensation Current regulation Temperature monitoring with indicator Active operation indicator Blink-warn indicator Switchable to interval operation Push-pull output stage for separate supply Package: SO16
D Supply voltage monitoring D Temperature compensated supply voltage limitation
Applications
D Domestic equipment D Tools
Block Diagram
2 LED control 1 +VS 16 GND Voltage limitation 12 Push– pull output 15 14 13 8 6 7 Oscillator
4
Temperature monitoring
Output control
PWM Control
10 9
5 Tristate
Program logic
Current limitation
11
95 10873
Figure 1. Block diagram
TELEFUNKEN Semiconductors Rev. A1, 29-May-96
1 (9)
U2350B-FP
2 (9)
R1 VM = 230 V~ 56 k W/ 2W +VS D3 red 2 LED – logic IGBT 14 T1 3 420 mV + – 100% 4 GND 12 Multi Stop Normal Progr.– logic Comparator 2 – + R 11 6 Voltage monitoring Oscillator 1.2 V/ 1.5 V 10 S1 R9 120 k W Impedance converter S3 S2 8 Comparator 1 – + 9 C1 10 nF
95 10868
D2 M
green 1 16 D1 15 Push pull stage BYT86 –800 47 mF/ 350 V C6 Supply voltage limitation
R 12
R10
82 k W
80% Q S 13 R Q R12 10 kW
Output stage logic
C7 + 350 mV – +V S open 5
10 mF/ 35 V
R8 0.22 W/ 4W C2 22 nF R7
Tristate switch
11 R6 180 k W
5.6 M W R3 220 k W
Figure 2. Block diagram with external circuit
C4 7 R5 C5 680 nF
C3
220 nF
120 k W
R13 NTC
220 nF
R14
Speed
R4 7.5 k W
47 k W
100 k W
TELEFUNKEN Semiconductors Rev. A1, 29-May-96
R 15 10 k W
U2350B-FP
Pin Description
LED1 LED2 n.c. NTC Progr. Rosc Cosc Contr. 1 2 3 4 5 6 7 8
95 11409
16 +VS 15 OUT+ 14 OUT 13 OUT– 12 GND 11 IContr. 10 S1 9 VContr.
Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Symbol LED1 LED2 n.c. NTC Progr. Rosc Cosc Contr. VContr. S1 IContr. GND OUT– OUT OUT+ +VS
Function LED output 1 LED output 2 Not connected Monitoring input Tristate programing Resistor for oscillator Capacitor for oscillator Control input Voltage regulation input Switching output, output S1 Current regulation input Ground – supply for output stage Output + supply for output stage Supply voltage
Supply, Pin 16
The internal voltage limiter in the U2350B enables a simple supply from the rectified line voltage. The supply voltage between Pin 16 (+VS) and Pin 12 (ground) is built up via R1 and is smoothed by C7. The typically 5 mA supply current is simultaneously used to operate the two LEDs D2, D3, which can both be bridged internally. The s.
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