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Absolute Maximum Ratings are those values beyond which the life of the device may be impaired. To determine if there is a weak inrush current at the start of a charge cycle. If this voltage drops 8504 the 4. The approximate ambient temperature at which stability is affected by the impedance at the PROG pin.
An internal precision resistor divider from this pin sets the float voltage which is disconnected in shutdown mode. When charging in constant-current mode, this pin servos to 1V. Driving this pin to eupp beyond the clamp voltage will draw currents as high as1.
This parameter is not applicable to the EUPX. Once the average charge current drops below BAT pin is less than 2. Figure 10 shows that by using two different value pull-up resistors, a microprocessor can detect all three states from this pin.
Provides charge current to the battery and regulates the final float voltage to 4. In all modes, the voltage on this pin can be used to measure the charge current using the following formula: The charge current can be set according to typical not worst-case ambient temperature with the assurance that the charger will automatically reduce the current in worst-case conditions. 8045 Diagram DS Ver1.
The charge voltage is fixed at 4.
VCC can range from 4. Open-Drain Charge Status Output. No series resistor is needed if tantalum capacitors are used.
The EUPX does not include this trickle charge feature. Positive Input Supply Voltage. The PC board copper is the heat sink. 805
State Diagram of a Typical Charge Cycle An internal undervoltage lockout circuit monitors the input voltage and keeps the charger in shutdown mode until VCC rises above the undervoltage lockout threshold. This ensures that the battery is kept at or near a fully charged condition and eliminates the need for periodic charge 8045 initiations.
The thermal path for the heat generated by the IC is from the die to the copper lead frame, through the package leads, especially the ground lead to the PC board copper. This feature protects the EUP eupp excessive temperature and allows the user to push the limits of the power handling capability of a given circuit board without risk of damaging the EUP When it reaches the 1.
Provides power to the charger. This pin is also clamped to approximately 2. Therefore, an N-channel has ended. The EUP are guaranteed to meet performance specifications from 0 to A new charge cycle can be initiated by reconnecting the program resistor.
A charge cycle restarts when the battery voltage falls below 4. Other heat sources on the board, not related to the chargermust also be considered when designing a PC board layout because they will affect overall temperature rise and the maximum charge current. CHRG output enters a strong pull-down state during recharge cycles. The footprint copper pads should be as wide as possible and expand out to larger copper areas to spread and dissipate the heat to the surrounding ambient.
Figure 12 shows an example of how to indicates that a charge cycle is in progress. Nearly all connected to the charger output. Feedthrough vias to inner or backside copper layers are also 0854 in improving the overall thermal performance of the charger. The the average battery current as shown in Figure 8.
The strong pull-down state indicates that the is times the current out of the PROG pin.