LT1511CSW Linear Technology, LT1511CSW Datasheet
LT1511CSW
Specifications of LT1511CSW
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LT1511CSW Summary of contents
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... Current Sensing Can Be at Either Terminal of the Battery Charging Current Soft-Start 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. *See LT1510 for 1.5A Charger U TYPICAL APPLICATIO D1 MBRD340 L1 ...
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... C J Measured at UV Pin 0. Undervoltage State UVOUT UVOUT V 20V, V 0.4V BAT INFORMATION TOP VIEW ORDER PART NUMBER 24 GND** 23 GND** LT1511CSW CC1 LT1511ISW CC2 *ALL V PINS SHOULD CC3 BE CONNECTED 19 PROG TOGETHER CLOSE TO THE PINS ALL GND PINS ARE FUSED TO INTERNAL DIE 17 UV ...
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ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are 200 (see Block Diagram PARAMETER Overall Boost Pin Current Switch Switch ON Resistance During Switch ON BOOST SW Switch OFF Leakage ...
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LT1511 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are load on any outputs unless otherwise noted. PARAMETER Voltage Amplifier VA Transconductance (Note 3) Output Source Current OVP Input Bias Current Current Limit Amplifier CL1, 8V Input Common Mode ...
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W U TYPICAL PERFORMANCE CHARACTERISTICS Switching Frequency vs Temperature 210 205 200 195 190 185 180 – 100 120 140 TEMPERATURE ( C) 1511 • TPC04 (Voltage Amplifier) VA OVP 4 3 ...
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LT1511 PIN FUNCTIONS GND (Pins 16, 23, 24): Ground Pin. SW (Pin 2): Switch Output. The Schottky catch diode must be placed with very short lead length in close proximity to SW pin ...
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W BLOCK DIAGRAM – 6.7V + 0.7V + – – 1.5V V BAT PWM C1 + GND – 75k 200kHz OSCILLATOR SHUTDOWN SLOPE COMPENSATION – ...
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LT1511 TEST CIRCUITS V C 60k 0.047 0.65V U OPERATION The LT1511 is a current mode PWM step-down (buck) switcher. The battery DC charging current is programmed by a resistor R (or a DAC output current) at ...
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U U APPLICATIONS INFORMATION Input and Output Capacitors In the 3A Lithium 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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LT1511 U U APPLICATIONS INFORMATION capacitor. A resistor divider is used to set the desired V lockout voltage as shown in Figure 2. A typical value for and R5 is found from: R6(V – ...
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U U APPLICATIONS INFORMATION LT1511 PROG 300 R PROG 4. VN2222 0V PWM I = (DC)(3A) BAT Figure 3. PWM Current Programming Lithium-Ion Charging The 3A Lithium Battery Charger (Figure 1) charges lithium- ion batteries at a constant ...
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... Secondly, constant trickle charge may not be recommended. Instead, a moderate level of current is used on a pulse basis ( duty cycle) with the time-averaged value substituting for a constant low trickle. Please contact the Linear Technology Applications Department about charge termination cir- cuits. If overvoltage protection is needed, R3 and R4 should be calculated according to the procedure described in Lithium- Ion Charging section ...
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U U APPLICATIONS INFORMATION P 3.5mA V 1.5mA V BIAS BAT 7.5mA 0.012 BAT BAT P DRIVER BAT SW BAT P SW ...
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LT1511 U U APPLICATIONS INFORMATION low thermal resistance system and to act as a ground plane for reduced EMI. Glue-on, chip-mounted heat sinks are effective only in moderate power applications where the PC board copper cannot be used, or where ...
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... Figure 12b. Modified Input Diode Connection 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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... Can Be Higher or Lower Than Battery Voltage Charge Current for Lithium-Ion, NiCd and NiMH Batteries GND OUT LT1511 • F14 0.598 – 0.614* (15.190 – 15.600 1511fb LT/TP 0399 REV B 2K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1995 0.394 – 0.419 (10.007 – 10.643) S24 (WIDE) 0996 ...