8681l Ic Datasheet Pdf Hot Download =link=
Separate the sensitive analog ground (FB trace components) from the noisy power ground (PGND) until they meet at a single star-ground point.
| Pin | Name | Key Function(s) | Typical Voltages | | :--- | :--- | :--- | :--- | | | VAC | Primary power supply input | ~18.6V - 20V | | 2 | IACP | Positive adapter current sensing | ~20V | | 3 | IACM | Negative adapter current sensing | ~20V | | 4 | ICHM | Negative battery charge current sensing | ~1.2V | | 5 | ICHP | Positive battery charge current sensing | ~1.3V - 9.6V | | 6 | VDDA | 5V linear regulator output | ~5.8V | | 7 | IAC | Adapter current sense output (20x gain) | ~0V - 1.33V | | 8 | COMP | Compensation pin for loop stability | ~0V - 1.4V | | 9 | ACAV | Adapter present indicator (active-high) | ~3.3V - 4.6V | | 10 | SCL | SMBus clock line for communication | ~3.3V | | 11 | SDL | SMBus data line for communication | ~3.3V | | 12 | BST | Bootstrap pin for high-side gate drive | ~5.8V - 13V | | 13 | HDR | High-side MOSFET gate driver output | ~1.2V - 9.3V | | 14 | LX | Switch node (connects to inductor) | ~1.2V - 9.3V | | 15 | VDDP | Internal analog circuit power for driver | ~5.8V - 7.1V | | 16 | LDR | Low-side MOSFET gate driver output | ~1.2V |
: Main input power supply pin connected to the AC adapter rails.
Engineers favor this IC for single-battery portable computer systems (like laptops and notebooks) because it provides comprehensive, end-to-end battery charging control. Key Features & Technical Specifications 8681l ic datasheet pdf hot download
. Choose an inductor with a saturation current rating higher than the peak switch current limit of the IC. Low-ESR ceramic capacitors (
: Battery voltage sense and battery current sensing paths.
: It is designed to handle multiple battery chemistries, including Lithium-ion (Li-ion) and Lithium-polymer, making it versatile for various portable devices. Separate the sensitive analog ground (FB trace components)
The internal block diagram of the 8681L IC combines several analog control loops and safety mechanisms to maximize power efficiency and system longevity. Pulse-Width Modulation (PWM) Control
The 8681L may also be labeled under alternative part numbers like S-8261 or XB8681L depending on the foundry. If you cannot find an exact match, compare pin-to-pin compatibility carefully.
. It is a critical component for power management and dual-band communication systems. WIT Computers Technical Specifications Key Features & Technical Specifications
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The 8681L is still available from many electronic component distributors, both online and through local suppliers. Some of the most popular sources include:
). If it reads 0V, inspect the inline current-limiting resistor or primary power rail source.
for the OZ8681L.