L6924U STMicroelectronics, L6924U Datasheet - Page 24

• Manufacturer Part Number: L6924U
• Description: Battery Management USB Battery Charger System w/integra
• Manufacturer: STMicroelectronics

Specifications of L6924U

• Product: Charge Management
• Battery Type: Li-Ion
• Output Voltage: 4.2 V
• Output Current: 30 mA
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Package / Case: VFQFPN
• Mounting Style: SMD/SMT
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Application information: monitoring and protection
Note:
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When the voltage (and thus, the temperature), returns to the window range, the device re-
starts the charging process. Moreover, there is a hysteresis for both the upper and lower
thresholds, as shown in
Figure 17. Battery temperature control flow chart
T
Figure 18. Voltage window with hysteresis on TH
Figure 19.
When the TH pin voltage rises and exceeds the V
L6924U stops the charge, and indicates a fault by the status pins. The device re-starts to
BAT
= OK when the battery temperature is between 0 °C and 50 °C
Pin connection
V
V
MAXTH_HYS
MINTH_HYS
V
V
MAXTH
MINTH
Figure 18
780mV
248mV
900mV
Doc ID 14716 Rev 2
.
225mV
Voltage
Variation on TH pin
MINTH
= 50 % of V
Charge disable
Charge enable
REF
(900 mV typ), the
L6924U