LT1769CGN#TR Linear Technology, LT1769CGN#TR Datasheet
LT1769CGN#TR
Specifications of LT1769CGN#TR
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LT1769CGN#TR Summary of contents
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... Shutdown Control U APPLICATIO S Chargers for NiCd, NiMH, Lead-Acid, Lithium Rechargeable Batteries Switching Regulators with Precision Current Limit , LTC and LT are registered trademarks of Linear Technology Corporation. *US patent number 5,723,970 **See LT1510 for 1.5A charger; see LT1511 for 3A charger U TYPICAL APPLICATIO †† ...
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LT1769 ABSOLUTE MAXIMUM Supply Voltage (V , CLP and CLN Pin Voltage) ......................... 30V CC BOOST Pin Voltage with Respect (Average)........................................................... 2A BAT Operating Junction Temperature Range Commercial ........................................... 125 C ...
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ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are load on any outputs unless otherwise noted. CLN CC PARAMETER Overall V Undervoltage Lockout (Switch OFF) Threshold CC UV Pin Input Current UV Output Voltage at ...
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LT1769 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T PARAMETER Voltage Amplifier VA Transconductance (Note 3) Output Source Current OVP Input Bias Current Current Limit Amplifier CL1, 8V Input Common Mode Turn-On Threshold Transconductance CLP Input Current CLN Input ...
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W U TYPICAL PERFORMANCE CHARACTERISTICS V Line Regulation REF 0.003 0.002 0.001 ALL TEMPERATURES 0 –0.001 –0.002 –0.003 Maximum Duty Cycle ...
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LT1769 PIN FUNCTIONS (GN/FE Pin Numbers) GND (Pins 14, 15, 22 28/Pins 4, 5, 14, 20): Ground Pins. Must be connected to expanded PC lands for proper heat sinking. See ...
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W BLOCK DIAGRAM – 0.7V + – – 1.5V V BAT PWM C1 + GND – 75k 200kHz OSCILLATOR SHUTDOWN SLOPE COMPENSATION – ...
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LT1769 TEST CIRCUITS V C 0.047 0.65V U OPERATION The LT1769 is a current mode PWM step-down (buck) switcher. The battery DC charge current is programmed by a resistor R (or a DAC output current) at the ...
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U U APPLICATIONS INFORMATION Input and Output Capacitors In the 2A Lithium-Ion Battery Charger (Figure 1), the input capacitor ( assumed to absorb all input switching IN ripple current in the converter must have adequate ripple ...
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LT1769 U U APPLICATIONS INFORMATION V = Rising lockout threshold on the UV pin Charger input voltage that will sustain full load power IN Example: With 6.7V and setting ...
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U U APPLICATIONS INFORMATION LT1769 PROG 300 R PROG 4. VN2222 0V PWM I = (DC)(2A) BAT Figure 3. PWM Current Programming holding the battery at “float” voltage indefinitely. In this case no external sensing of full charge ...
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LT1769 U U APPLICATIONS INFORMATION charger may be turned on periodically to complete a short float-voltage cycle. Current trip level is determined by the battery voltage, R1 through R3 and the sense resistor (R hysteresis in the trip level to ...
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U U APPLICATIONS INFORMATION Example 19V 12.6V BAT P 3.5mA 19 1.5mA 12.6 BIAS 2 12.6 7.5mA 0.012 2000mA 12 DRIVER ...
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LT1769 U U APPLICATIONS INFORMATION 2-LAYER BOARD 25 4-LAYER BOARD 20 MEASURED FROM AIR AMBIENT 15 TO DIE USING COPPER LANDS AS SHOWN ON DATA SHEET BOARD AREA ...
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... NOTE: CONNECT ALL GND PINS TO EXPANDED PC LANDS FOR PROPER HEAT SINKING Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...
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... FE20 (CB) TSSOP 0203 0.386 – 0.393* (9.804 – 9.982 1615 0.229 – 0.244 (5.817 – 6.198 CHG LT/TP 1101 1.5K REV A • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1999 0.033 (0.838) REF 0.150 – 0.157** (3.810 – 3.988) GN28 (SSOP) 1098 1769fa ...