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Power Supply for Notebook PC
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Overview
The power supply of a notebook PC consists of a circuit for charging the internal battery (this circuit is built into the battery) using DC input from the external charger adapter and DC/DC converters for supplying the voltages required by the internal circuit blocks. For the CPU, a voltage regulator module (VRM) provides fine-grained and rapid control of the supply voltage according to the operating mode. The VRM requires high-speed switching to enable responsive handling of large currents in particular.
Renesas supplies low-loss power MOSFETs that are ideal for such applications. Battery protection requires fine-grained control, and a dedicated protection IC with an on-chip MCU is used for this purpose. To enable full use of battery capacity, power MOSFETs with extremely low on-resistance are used for switching.
System Block Diagram
Recommended Products
Recommended DC/DC Components
| Block | Supply No. | Part No. | Package | VDSS (V) | ID (A) | 10V RDS (on)(mΩ) | Qg (nC) | |
|---|---|---|---|---|---|---|---|---|
| Typ | max | |||||||
| Synchronous rectifier | CPU drive | RJK0348DSP | SOP-8 | 30 | 22 | 2.6 | 3.4 | 34 |
| RJK0349DSP | 30 | 20 | 2.9 | 3.8 | 25 | |||
| RJK0352DSP | 30 | 18 | 4.3 | 5.6 | 16 | |||
| RJK0353DSP | 30 | 18 | 4.5 | 5.9 | 15 | |||
| RJK0354DSP | 30 | 16 | 5.4 | 7 | 12 | |||
| RJK0355DSP | 30 | 12 | 8.5 | 11.1 | 6 | |||
| RJK0366DSP | 30 | 11 | 9 | 11.7 | 6.5 | |||
| RJK0369DSP | 30 | 9 | 12 | 15.6 | 5.6 | |||
| RJK0371DSP | 30 | 8 | 14 | 19 | 3.8 | |||
| RJK0305DPB | LFPAK | 30 | 45 | 6.7 | 8 | 8 | ||
| RJK0328DPB | 30 | 60 | 1.6 | 2.1 | 42 | |||
| RJK0329DPB | 30 | 55 | 1.8 | 2.3 | 35 | |||
| RJK0330DPB | 30 | 45 | 2.1 | 2.7 | 27 | |||
| RJK0331DPB | 30 | 40 | 2.6 | 3.4 | 21 | |||
| RJK0332DPB | 30 | 35 | 3.6 | 4.7 | 14 | |||
| RJK03C0DPA | WPAK | 30 | 70 | 1.4 | 1.8 | 66 | ||
| RJK0390DPA | 30 | 65 | 1.7 | 2.2 | 54 | |||
| RJK0391DPA | 30 | 50 | 2.2 | 2.9 | 34 | |||
| RJK0392DPA | 30 | 45 | 2.7 | 3.5 | 26 | |||
| RJK0393DPA | 30 | 40 | 3.3 | 4.3 | 21 | |||
| RJK0394DPA | 30 | 35 | 4.1 | 5.3 | 15.5 | |||
| RJK0395DPA | 30 | 30 | 5.9 | 7.7 | 11 | |||
| RJK0396DPA | 30 | 30 | 6.9 | 9 | 9 | |||
| RJK0397DPA | 30 | 30 | 7.8 | 10.1 | 7.4 | |||
| RJK03B7DPA | 30 | 30 | 7 | 8.8 | 11 | |||
| RJK03B8DPA | 30 | 30 | 8 | 10.1 | 9 | |||
| RJK03B9DPA | 30 | 30 | 8.9 | 11.2 | 7.4 | |||
| Converter | Memory, CD-ROM | RJK03E0DNS | HWSON3030-8 | 30 | 30 | 4.3 | 5.6 | 14.8 |
| RJK03E1DNS | 30 | 25 | 5.3 | 6.9 | 11 | |||
| RJK03E2DNS | 30 | 16 | 6.9 | 9 | 7.4 | |||
| RJK03E3DNS | 30 | 14 | 9 | 11.6 | 5.8 | |||
| HDD | RJK0389DPA | WPAK | 30/30 | 15/20 | 8.2/6.8 | 10.7/8.9 | 6/7.2 | |
| Power management switch/ (load SW) | 3.3 V/1.5 V/1.05 V | RJK0353DSP | SOP-8 | 30 | 18 | 4.5 | 5.9 | 15 |
| RJK0394DPA | WPAK | 30 | 35 | 4.1 | 5.3 | 15.5 | ||
| UPA2802T1L | 8-pin Mini-HVSON | 20 | 18 | 4.6 | 5.8 | 16* | ||
| UPA2803T1L | 20 | 20 | - | - | 20* | |||
| UPA2200T1L | 30 | 8 | - | 23 | 9* | |||
| UPA2200T1M | 8-pin VSOF-Slim | 30 | 8 | - | 23 | 9* | ||
| UPA2201T1M | 20 | 9 | - | - | 13* | |||
| UPA2211T1M | -12 | 7.5 | - | - | 15* | |||
| Power management switch/ (Select SW) | Main DC power line/ battery pack | UPA2812T1L | 8pHVSON (3333) | -30 | 30 | 4.2 | 5.2 | 102 |
| UPA2813T1L | -30 | 27 | 5.6 | 7.0 | 79 | |||
| UPA2814T1S | HWSON-8 | -30 | 24 | 7.2 | 9.0 | 69 | ||
| UPA2815T1S | -30 | 21 | 9.0 | 12 | 46 | |||
| UPA2816T1S | -30 | 17 | 12 | 18 | 32 | |||
| Charger | Select SW | UPA2520T1H | 8-pin VSOF (2429) | 30 | 10 | 9.4 | 13.2 | 10.8* |
| UPA2521T1H | 30 | 8 | 12 | 16.5 | 7.6* | |||
| Backlight | Backlight | HAT2114R[D] | SOP-8 | 60 | 6 | 28 | 32 | 15 |
| HAT2215R[D] | 80 | 3.4 | 88 | 115 | 7.3 | |||
| Block | Semiconductor device | Recommended products | Features, etc. |
|---|---|---|---|
| Battery pack | IC for smart batteries | R2J24020F | 16-bit R8C CPU On-chip N-ch FET high-side driver (AFE) Advanced functions Low power consumption On-chip WDT (AFE) C language support |
| R2J24050F | 16-bit R8C CPU On-chip N-ch FET high-side driver (AFE) Advanced functions Low power consumption On-chip WDT (AFE) C language support Small package (TSSOP48) | ||
| Power MOSFET | see below | ||
Power MOSFETs for Battery Protection
| Block | Part No. | Package | VDSS (V) | ID (A) | 10V RDS (on)(mΩ) | |
|---|---|---|---|---|---|---|
| Typ | max | |||||
| Battery | HAT1125H | LFPAK | -30 | -45 | -45 | 5.9 |
| Protection/reverse | HAT1127H | -40 | -40 | 8.6 | ||
| Protection | RJJ0315DSP | SOP-8 | -30 | -16 | 5.2 | 6.5 |
| RJJ0318DSP | -12 | 9.5 | 12 | |||
| RJJ0319DSP | -10 | 12.5 | 15.5 | |||
| RJJ0315DPA | WPAK | -30 | -35 | 4.8 | 5.9 | |
| UPA2804T1L | 8-pin Mini HVSON | 30 | 28 | 5.6 | 6.8 | |
| UPA2807T1L | 34 | 3.8 | 4.6 | |||
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