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LT1513CR#TRPBF

500kHz SEPIC battery charger, multi-chemistry, DDPAK-7

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Pieza del fabricante：

LT1513CR#TRPBF

Paquete：

DDPAK-7 (10.4 x 7.5 x 4.6 mm)

Marca：
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Descripción

Productos

The LT1513CR#TRPBF from Analog Devices is a 500kHz current-mode SEPIC battery charger IC supporting multi-chemistry (Li-Ion, NiMH, Lead-Acid) charging from a 6V to 25V input in DDPAK-7 package.

Especificaciones

Topology SEPIC battery charger
Switching Frequency 500 kHz
Input Voltage Range 6 V to 25 V
Charge Current Programmable (up to 1.2A)
Battery Chemistry Li-Ion, NiMH, Lead-Acid
Switch Current Limit 2A internal
Switch Voltage 25V max
Accuracy +/-1% voltage, +/-5% current
Paquete DDPAK-7 (CR suffix)
Temperatura de funcionamiento -40 to +125 C

Características

  • SEPIC topology allows VBAT higher or lower than VIN
  • Multi-chemistry support with programmable voltage and current
  • 500kHz switching frequency minimizes external component size
  • 2A internal switch eliminates external MOSFET
  • +/-1% charge voltage accuracy for Li-Ion safety

Aplicaciones

  • Single-cell Li-Ion battery charger from automotive input
  • NiMH battery pack charger
  • Lead-Acid battery maintenance charger
  • Portable equipment docking station charger
  • Solar panel battery charging system

The LT1513CR#TRPBF from Analog Devices is a 500kHz current-mode switching regulator specifically configured as a battery charger using the SEPIC topology. The SEPIC topology uniquely allows the battery voltage to be either higher or lower than the input voltage, making it ideal for charging from variable sources such as automotive supplies (6-25V). The device supports Li-Ion, NiMH, and Lead-Acid battery chemistries with programmable charge voltage and current. The 2A internal power switch eliminates the need for an external MOSFET, and the +/-1% charge voltage accuracy ensures safe Li-Ion charging. The CR suffix denotes DDPAK-7 package, TRPBF indicates tape and reel with lead-free finish.

The LT1513CR#TRPBF operates as a current-mode SEPIC battery charger. (1) The SEPIC topology uses a coupling capacitor (Ccouple) to transfer energy from input to output while maintaining DC isolation between input and output. This allows the output (battery) voltage to be either higher or lower than the input voltage, unlike a buck charger which requires VIN > VBAT. When the switch is on, energy is stored in the inductor and Ccouple charges. When the switch is off, energy is transferred through the diode to the battery. (2) The current-mode control loop senses the switch current and compares it with the error amplifier output to regulate either charge current or charge voltage. For Li-Ion batteries, the charger operates in constant-current mode until the battery reaches the programmed float voltage, then transitions to constant-voltage mode. (3) The charge current is programmed by a resistor from the PROG pin to ground, and the charge voltage is set by an external resistor divider from the battery to the VFB pin. The +/-1% voltage accuracy ensures the battery is charged to the correct float voltage for safety and longevity.

Pin Nombre Función
1 SW Switch output (to inductor/diode)
2 GND Suelo
3 VC Compensation pin for control loop
4 VFB Voltage feedback input
5 PROG Charge current programming
6 VIN Input supply (6-25V)
7 GND Ground (tab)
  • Single-cell Li-Ion (4.2V) battery charger from automotive 12V supply using SEPIC topology
  • NiMH battery pack charger with constant-current termination
  • Lead-Acid battery maintenance charger with float voltage regulation
  • Portable equipment docking station charger with multi-chemistry support
  • Solar panel battery charging system where input voltage varies widely
Modelo Fabricante Diferencia clave
LT1512CS8#PBF Dispositivos analógicos 200kHz, SOIC-8, same family
LT3650EMSE-8.2 Dispositivos analógicos Buck charger, 2A, Li-Ion 8.2V
BQ24650RVAT TI Buck, solar MPPT, 5A, QFN
MCP73871-2CCI/ML Microchip Linear charger, Li-Ion, QFN
LT3741EMSE#PBF Dispositivos analógicos SEPIC, constant current LED driver
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