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| Voltage and Current Controller FEATURES Two ored error amplifiers with built-in current generator with enable/disable function. 1.24V series voltage reference with trimmed 1% tolerance (CYT101A). 4.5 to 32V supply voltage range. 5kV ESD protection. Temperature-compensated. CYT101 DESCRIPTION The CYT101/CYT101A provide a pin-for-pin replacement of TSM101/A. This is an 8-pin voltage & current controller incorporates a trimmed series bandgap voltage reference, two ored error amplifiers and a current source. This IC provides a feedback to the primary side of a power supply by comparing the DC voltage and the current level at the output to an internal reference. The controlled current generator can be used to modify the level of current limitation by offsetting the information coming from the current sensing resistor. The CYT101/A can be used in every types of application requiring a precision voltage regulation and current limitation. For example, designers can save space by using this 8-pin IC for a CC/CV mode battery charger. D DIP8 (8-Pin Plastic DIP) M SO8 (8-Pin Plastic SOIC) ORDER INFORMATION ORDER CODE CYT101AM/D CYT101M/D 0, +125 Temperature Range Bandgap Tolerance 1% 2.5% PIN CONFIGURATION Vref 1 EN Iref 2 3 8 7 6 - +Vcc Vfb OUTPUT Ifb APPLICATIONS This circuit is designed to be used in battery chargers with a constant voltage and a limited output current. It can be used in every types of application requiring a precision voltage regulation and current limitation. Other application include voltage supervisors, over voltage protection... + - GND 4 + 5 PIN DESCRIPTION Pin 1 2 Name VREF EN I/O O I Function Trimmed Voltage Reference Output 1.24V, 10mA max. Current source enable input. This current source can be used to Offset the voltage measurement on the sense resistor and therefore to modify the charge current. The current source is enabled when the Input voltage on pin 2 is lower than 0.8V Current Limitation Reference Input Ground Current Limitation Loop Input, connected to the sense resistor Output pin common to the voltage regulation and current limitation Loops. Inverting input of the voltage error amp, The non-inverting input is from VREF, 1.24V Power Supply Input 3 4 5 6 7 8 IREF GND IFB OUTPUT VFB VCC I I I O I I Preliminary and all contents are subject to change without prior notice. 1 Voltage and Current Controller CYT101 Unit V mA V mA mW /W ABSOLUTE MAXIMUM RATINGS Symbol VCC IOUT VIN IIN PD TJ RTHJ-A TSTG Supply Voltage Output Current Input Voltage Input Current Power Dissipation Maximum Junction Temperature Thermal Resistance Junction to Ambient Storage Temperature Parameter Value 36 20 -0.3, VCC -1.5 1 200 150 130 to 200 0 to +125 RECOMMENDED CONDITIONS Symbol VCC TOP Supply Voltage Operating Free-air Temperature Range Parameter Value 4.5 to 32 0 to 125 Unit V ELECTRICAL CHARACTERISTICS The conditions are: TA =25, VCC = 15V unless otherwise stated Condition Over TOP apply over full temperature range (0 to 125) Symbol Parameter Test Conditions Min. Typ. Max. Unit ERROR AMPLIFIER ICC VIN VIO IIB ISINK AVO PSRR CMRR GBP IOH Total Supply Current Input Voltage Range Input Offset Voltage Input Bias Current @VIN = 1.2V on pin 7 and VIN = 0V on pin 5 VCC = 15V 0 TA =25 Over TOP TA =25 Over TOP 25 Over TOP RL =2, Over TOP Over TOP Over TOP VCC = 15V, F = 100kHz -5 -7 -700 -1000 8 15 65 1 -300 15 2 VCC -1.5V 5 7 0 0 mA V mV nA mA V/mV Output Sink Current, VOL = 2.5V Large Signal Voltage Gain Power Supply Rejection Ratio Common Mode Rejection Ratio Gain Bandwidth Product Output Leakage Current 90 80 1 2 7 dB dB MHz A VI = 10mV, RL = 2 CL = 100pF 25 Over TOP IOUT = 1mA Over TOP 1 mA< IOUT < 10mA 5V < VIN < 32V 1.227 1.21 1.24 1.24 30 5 3.5 VOLTAGE REFERENCE VREF TCVR VLR VSR Reference Voltage Temperature Stability Load Regulation Line Regulation CYT101A CYT101 1.252 1.27 100 15 10 V ppm/ mV mV Preliminary and all contents are subject to change without prior notice. 2 Voltage and Current Controller CYT101 ELECTRICAL CHARACTERISTICS (cont'd) The conditions are: TA =25, VCC = 15V unless otherwise stated Condition Over TOP apply over full temperature range (0 to 125) Symbol Parameter Test Conditions Min. Typ. Max. Unit CURRENT GENERATOR IO TCCG ISR VEN VIDIS IEN ILEAK Current Source Temperature Stability Line Regulation Voltage at EN pin to have IO = 1.4mA Voltage at the EN pin to have IO = 0mA Input Current on the EN pin Leakage Current Over TOP 4.5 < VCC < 32V Over TOP Over TOP Over TOP VEN =2V Over TOP 2 0.5 30 2 1.4 500 0.003 0.03 0.6 mA ppm/ mA V V A A PACKAGE MECHANICAL SO8 1 2 D 8 7 6 B1 B DIM A A1 B B1 C D H E N 3 4 DIMENSIONS INCHES MM MIN MAX MIN MAX 0.0532 0.0688 0.0040 0.0098 0.0130 0.0200 0.050 BSC 0.0075 0.0098 0.1890 0.1968 0.2284 0.2440 0.1497 0.1574 1.35 1.75 0.10 0.25 0.33 0.51 1.27 BSC 0.19 0.25 4.80 5.00 5.80 6.20 3.80 4.00 5 A1 E H A C PACKAGE MECHANICAL DIP8 Z e 1 2 D 8 7 6 5 a F A I e1 L B DIM A a B b b1 D E e e1 F I L Z N DIMENSIONS INCHE MM MIN MAX MIN 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 0.260 0.200 0.125 0.150 0.060 3.32 0.51 1.15 1.65 0.356 0.55 0.204 0.304 10.92 7.95 9.75 2.54 7.62 6.60 5.08 3.18 3.81 1.52 3 4 b b1 E Preliminary and all contents are subject to change without prior notice. 3 |
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