L6924D STMicroelectronics, L6924D Datasheet - Page 34

• Manufacturer Part Number: L6924D
• Description: IC BATTERY CHARGER SYS 16-VFQFPN
• Manufacturer: STMicroelectronics

Specifications of L6924D

• Function: Charge Management
• Battery Type: Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)
• Voltage - Supply: 2.5 V ~ 12 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-VFQFN
• Product: Charge Management
• Output Current: 30 mA
• Operating Supply Voltage: 2.5 V to 12 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• For Use With: 497-8428 - BOARD EVAL CHARGER ST7260/L6924D497-8247 - BOARD EVAL FOR L6924UTR497-5504 - EVAL BOARD FOR L6924D
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Application ideas
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10.1
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Application ideas
USB battery charger
With a voltage range between 4.75 V and 5.25 V, and a maximum current up to 500 mA, the
USB power bus is an ideal source for charging a single-cell Li-Ion battery. Since it is not
possible to rely on the USB current limit to charge the battery, a linear approach must be
adopted. Therefore, it is only necessary to set the I
500 mA, and the device will charge the battery in Linear mode.
Figure 29
Figure 29. USB charger application
CONTROLLER
D- D+
SYSTEM
AND
USB
GND
V
BUS
shows an example of USB charger application schematic.
C1
C2
C4
V
T
ST2 SD GND
Doc ID 11908 Rev 9
V
ST1
IN
PRG
INSNS
V
REF
L6924D
R1
R4
V
OPRG
TH
V
V
V
I
OSNS
I
PRG
END
I
OUT
PRE
PRE
CHG
R5
with a maximum value lower than
R2
R3
C3
BATTERY
PACK
L6924D