TSM101 STMicroelectronics, TSM101 Datasheet
TSM101
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TSM101 Summary of contents
Page 1
... BUILT-IN CURRENT GENERATOR WITH ENABLE/DISABLE FUNCTION 4.5 TO 32V SUPPLY VOLTAGE RANGE SO8 AND DIP8 PACKAGES DESCRIPTION The TSM101/TSM101A integrated circuit incorpo- rates a high stability series band gap voltage refer- ence, two ORed operational amplifiers and a cur- rent source. This IC compares the DC voltage and the current level at the output of a switching power supply to an internal reference ...
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... The magnitude of input and output voltages must never exceed -0.3V or VCC -1.5V. OPERATING CONDITIONS Symbol V Supply Voltage CC T Operating Free Air Temperature Range oper ELECTRICAL CHARACTERISTICS T = 25° 15V (unless otherwise specified) amb CC OPERATIONAL AMPLIFIER: TSM101C/I/AC/AI Symbol Total Supply Current 1. Input Voltage Range i Input Offset Voltage V 25°C io ...
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... ELECTRICAL CHARACTERISTICS T = 25° 15V (unless otherwise specified) amb CC VOLTAGE REFERENCE : TSM101 Symbol Parameter Reference Voltage V ref I = 1mA 25°C amb out Temperature Stability min amb max Load Regulation R eglo 1 I 10mA out Line Regulation R egli 5 V 32V in VOLTAGE REFERENCE : TSM101A ...
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... TSM101/A DESCRIPTION Name Pin Type V 1 OUTPUT ref V 7 INPUT rin C 5 INPUT rin C 3 INPUT rref C 2 INPUT sen OUTPUT 6 OUTPUT V 8 INPUT cc GND 4 INPUT 4/13 Function Voltage Reference Output 1.24V, 10mA max. Do not short circuit Voltage Regulation Loop input Current Limitation Loop Input, connected to the sense resisto Current Limitation Reference Input Current source enable input ...
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... This limitation is generally realized by sensing the current of the power transistor, in the primary side of the SMPS. The role of the TSM101 is to make a fine regula- tion of the output current of the SMPS and a pre- cise voltage limitation. The primary current limitation is conserved and acts as a security for a fail-safe operation if a short-circuit occurs at the output of the charger ...
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... The current regulation is effective when the volt- age drop across R5 is equal to the voltage on pin 5 of the TSM101 (assuming that the internal cur- rent source is disabled). For medium currents (<1A), a voltage drop across R5 of 200mV = Vr5 is a good value, R5 can be re- alized with standard low cost 0 ...
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... TSM101. The same problem occurs when the output is short-circuited. A solution to provide a quasi constant supply volt- age to the TSM101 is shown at figure auxil 220 R9 = short circuit R1 = 10k C2 = 100nF C5 = 100nF > ...
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... TSM101/A Figure Auxiliary Winding for TSM101 Power Supply 5.3. Higher Precision for the Voltage Control The voltage drop through the sense resistor R5 offsets the voltage measurement. In most battery charging applications, this offset is not taken into account because the error is negligeable com- ...
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... Figure 6 shows how this can easily be achieved using an additional dual comparator (type LM393) where the first operator (C1) is used to activate the TSM101 internal current generator to offset the current measurement thanks to R4, and the sec- ond (C2) is used to switch the status LED off. On ...
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... An immediate way to take advantage of the high integration and reliability of TSM101 is to use voltage and current controller on power supplies secondary. The application note AN896 describes precisely how to use TSM101 in an SMPS battery charger ...
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... Control 200mA R1 10k R2 1.2k R3 220k R4 100 R5 1 eq2 12k P1 100 2 straps 0 C2 100nF C3 100nF eq3 C5 100nF Figure 2 eq4 TSM101/A 12V 8.2V 1A 200mA 500mA 100mA 10k 10k 1.2k 1.2k 220k 220k 8.2k 5.6k 100 100 0 0 100nF 100nF 100nF 100nF 22 F 4.7 F ...
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... TSM101/A PACKAGE MECHANICAL DATA 8 PINS - PLASTIC DIP Dim. Min 0.51 B 1.15 b 0.356 b1 0.204 3.18 Z 12/13 Millimeters Typ. Max. 3.32 1.65 0.55 0.304 10.92 9.75 2.54 7.62 7.62 6.6 5.08 3.81 1.52 Inches Min. Typ. Max. 0.131 0.020 0.045 0.065 0.014 0.022 0.008 0.012 0.430 0.313 0.384 0.100 0.300 0.300 0260 0.200 ...
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... Millimeters Typ. Max. 1.75 0.25 1.65 0.85 0.48 0.25 0.5 45° (typ.) 5.0 6.2 1.27 3.81 4.0 1.27 0.6 8° (max.) STMicroelectronics GROUP OF COMPANIES © http://www.st.com TSM101/A c1 Inches Min. Typ. Max. 0.069 0.004 0.010 0.065 0.026 0.033 0.014 0.019 0.007 0.010 0.010 0.020 0.189 0.197 0.228 0.244 0.050 0.150 0.150 0.157 ...