Salim Badakhshan
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Laptop Power Sequence Final
Technical Specifications
Technical Summary
This HP laptop motherboard uses a MAX1999 (PU10) charging IC to generate 5VPCU and 3VPCU standby voltages from the 19V adapter input. The EC/KBC is a PC97551 (97551) which manages power sequencing including DNBSWON#, SUSON, MAINON#, and VRON signals. The CPU core voltage is regulated by a MAX1907 (PU9) IC with a 0.700V-1.708V output range and 2V-28V input range. Additional power generation includes a 1992E (PU5) for VCCP and a MAX1845 (PU5) for 2.5VSUS and 1.5V_S5 outputs. The power sequencing relies on HWPG feedback convergence from multiple voltage rails before PWROK is sent to the Southbridge.
Technician FAQ
Q: What EC/KBC is used on this HP motherboard?
A: The EC/KBC is a PC97551 (97551) IC.
Q: What charging IC is used on this motherboard?
A: The charging IC is a MAX1999 (PU10) with 4.5V to 24V input voltage range.
Q: What ICs generate the CPU core voltage?
A: The CPU core voltage (VCC-CORE) is generated by MAX1907 (PU9), and VCCP is generated by 1992E (PU5).
Technical data structured and organized by Dr-Bios.com, based on original schematic source analysis.
Technical Specifications
| Parameter | Value |
|---|---|
| Brand | HP |
| Charging IC | MAX1999 (PU10) |
| Power IC(s) | MAX1907 (PU9), 1992E (PU5), MAX1845 (PU5) |
| EC / KBC | PC97551 (97551) |
Technical Summary
This HP laptop motherboard uses a MAX1999 (PU10) charging IC to generate 5VPCU and 3VPCU standby voltages from the 19V adapter input. The EC/KBC is a PC97551 (97551) which manages power sequencing including DNBSWON#, SUSON, MAINON#, and VRON signals. The CPU core voltage is regulated by a MAX1907 (PU9) IC with a 0.700V-1.708V output range and 2V-28V input range. Additional power generation includes a 1992E (PU5) for VCCP and a MAX1845 (PU5) for 2.5VSUS and 1.5V_S5 outputs. The power sequencing relies on HWPG feedback convergence from multiple voltage rails before PWROK is sent to the Southbridge.
Technician FAQ
Q: What EC/KBC is used on this HP motherboard?
A: The EC/KBC is a PC97551 (97551) IC.
Q: What charging IC is used on this motherboard?
A: The charging IC is a MAX1999 (PU10) with 4.5V to 24V input voltage range.
Q: What ICs generate the CPU core voltage?
A: The CPU core voltage (VCC-CORE) is generated by MAX1907 (PU9), and VCCP is generated by 1992E (PU5).
Technical data structured and organized by Dr-Bios.com, based on original schematic source analysis.
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