LTC1960CG#TR Linear Technology, LTC1960CG#TR Datasheet
LTC1960CG#TR
Specifications of LTC1960CG#TR
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LTC1960CG#TR Summary of contents
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... SSOP packages allow implementation of a com- plete SBS-compliant dual battery system while consum- ing minimum PCB area. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. ...
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LTC1960 ABSOLUTE AXI U RATI GS Voltage from DCIN, SCP, SCN, CLP GND ................................................32V to – 0.3V Voltage from SCH1, SCH2 to GND .............28V to – 0.3V Voltage from BOOST to GND .....................41V to ...
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ELECTRICAL CHARACTERISTICS temperature range (Note 7), otherwise specifications are at T SYMBOL PARAMETER Supply and Reference Battery Operating Voltage Range Battery Drain Current V Diodes Forward Voltage: PLUS V DCIN to V FDC PLUS V BAT1 to V FB1 PLUS ...
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LTC1960 ELECTRICAL CHARACTERISTICS temperature range (Note 7), otherwise specifications are at T SYMBOL PARAMETER DACs V VDAC Resolution RES V VDAC Granularity STEP V VDAC Offset OFF t VDAC Pulse Period VP Charge Mux Switches t GCH1/GCH2 Tur-On Time ONC ...
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ELECTRICAL CHARACTERISTICS temperature range (Note 7), otherwise specifications are at T SYMBOL PARAMETER t Gate B1I/B2I/DCI Turn-On Time ONPI t Gate B1I/B2I/DCI Turn-Off Time OFFPI V Input Gate Clamp Voltage PONI GB1I GB2I GDCI V Input Gate Off Voltage POFFI ...
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LTC1960 W U TYPICAL PERFOR A CE CHARACTERISTICS Battery Drain Current (BAT1 Selected) 250 T = 25°C A 240 230 220 210 200 190 180 170 160 150 BAT1 VOLTAGE (V) 1960 G01 Charger Efficiency 100 ...
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W U TYPICAL PERFOR A CE CHARACTERISTICS Voltage Accuracy 100 DCIN = 24V T = 25° 100mA LOAD –25 –50 –75 –100 250 450 650 850 1050 1250 1450 VDAC VALUE 1960 G09 ...
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LTC1960 PIN FUNCTIONS (G/UHF) Input Power Related SCN (Pin 4/Pin 30): PowerPath Current Sensing Negative Input. This pin should be connected directly to the “bot- tom” (output side) of the low valued resistor in series with the ...
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PIN FUNCTIONS (G/UHF) TGATE (Pin 32/Pin 21): Drives the Top External MOSFET of the Battery Charger Buck Converter. SCH1 (Pin 33/Pin 22), SCH2 (Pin 36/Pin 25): Charger MUX Switch Source Returns. These two pins are con- nected ...
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LTC1960 W BLOCK DIAGRA (LTC1960CG Pin Numbers Shown) CHARGE DCIN PUMP ON – GCH1 34 + SCH1 33 ON GCH2 – SCH2 36 BAT1 3 2 BAT2 V 1 PLUS REGULATOR GND 16 ...
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U OPERATIO (Refer to Block Diagram and Typical Application) OVERVIEW The LTC1960 is composed of a battery charger controller, charge MUX controller, PowerPath controller, SPI inter- face, a 10-bit current DAC (IDAC) and 11-bit voltage DAC (VDAC). When coupled with ...
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LTC1960 U OPERATIO 2-Byte SPI Write Format: bit 7........byte 1..........bit 0 MOSI MISO IDAC Write Address: A[2:0] = b000 IDAC Data Bits D9-D0: IDAC ...
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U OPERATIO A status read is illustrated in Figure 2. SSB SCK MOSI MISO Figure 2. SPI Read and Battery Charger Controller The LTC1960 ...
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LTC1960 U OPERATIO reverse current from flowing in the switches. In essence, this system performs as a low forward voltage diode. Operation is identical for BAT2. DCIN + 10V (CHARGE PUMPED) BAT1 TO – BATTERY 1 EAC 35mV CSN FROM ...
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U OPERATIO Autonomous PowerPath Switching The LOPWR comparator monitors the voltage at the load through the resistor divider from pin SCN. If any POWER_BY bit is set and the LOPWR comparator trips, then all of the switches are turned on ...
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LTC1960 U OPERATIO Note that the reference voltage must be subtracted from the VDAC value in order to obtain the correct output voltage. This value is V /16mV = 50 (32 REF Capacitors C and C are used to average ...
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U U APPLICATIONS INFORMATION Automatic Current Sharing In a dual parallel charge configuration, the LTC1960 does not actually control the current flowing into each individual battery. The capacity, or Amp-Hour rating, of each battery determines how the charger current is ...
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... Extending System to More than 2 Batteries The LTC1960 can be extended to manage systems with more than 3 sources of power. Contact Linear Technology Applications Engineering for more information. Charging Depleted Batteries Some batteries contain internal protection switches that disconnect a load if the battery voltage falls below what is considered a reasonable minimum ...
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U U APPLICATIONS INFORMATION and greater core losses. A reasonable starting point for setting ripple current is ∆I = 0.4(I L MAX ∆I exceed 0.6(I ) due to limits imposed by IREV and L MAX CA1. Remember the maximum ∆I ...
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LTC1960 U U APPLICATIONS INFORMATION 10µs and the internal IDAC resistor, R ripple voltage can be approximated by: V • T ∆ ∑ REF ∆ ISET R • SET Then the equation to extract C7 is: ...
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U U APPLICATIONS INFORMATION switching frequency. Switching ripple current splits be- tween the battery and the output capacitor depending on the ESR of the output capacitor and the battery imped- ance. If the ESR 0.2Ω and the ...
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LTC1960 U U APPLICATIONS INFORMATION I is the fixed drive current into the gate from the DRIVE LTC1960 and “t” is the time it takes to move that charge to a new state and change the MOSFET conduction mode. Hence ...
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... PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE 0.75 ± 0.05 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 Package 36-Lead Plastic SSOP (5 ...
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... C R OUT SNS 20µF 25V CHARGE MUX 0.025Ω Q10 Q3 1960 TA02 ; Power Good Output; 3.5V ≤ V ≤ 36V and C OUT IN and C ; Uses Smallest Components IN OUT ≤ 2V; OUT LT 0306 • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2001 LOAD 1960fa ...