Talk:Regulators

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JSD-001 motherboard[edit]

All the components listed are controlled by Syscon and connected to it by a pin/trace either directlly or indirectlly, the traces are hidden in internal layers of the motherboard

By looking at the first syscon model used by the PS3 CXR713120-201GB where we know the names of the pin signals it seems these syscon control lines for voltage regulators could be the syscon pins named SW_x or SW_x_x (switches, used as a generic name for slave components that only has 2 states)

Mitsumi 463A (STBY)[edit]

Mitsumi voltage regulator 463A
Seen on a JSD-001 motherboard
Pin # Name Description
1 5V_EVER Input 5v standby rail, from power supply (pin 1 of connector CN101)
2 3.3V_EVER_B Output 3.3v standby rail 2
3 RST/SYSCON_RST Goes under package to the black 100 ohm resistor at its right, and from there to syscon pin26@SW2-303
4 ? Goes under package to squared testpad/sinkhole at its right (not connected ?)
5 VCAP Capacitor to ground
6 ? To squared testpad/sinkhole at its top (not connected ?)
7 GND Ground
8 3.3V_EVER_A Output 3.3v standby rail 1

Mitsumi 348A (HDMI)[edit]

Mitsumi voltage regulator 348A
Seen on a JSD-001 motherboard
Pin # Name Description
1 N/C Not connected
2 HDMI_EN Connected to SW2-30x pin 119
Connected to HDMI connector pin 18 (+5V output) through a transistor
3 GND Ground (this pin also dissipates heat to the circuit board ground layer)
4 HDMI_VCC1 / +5V_ANA ? Connected to HDMI controller MN8647091 pin 100 (and a lot more pins). It have a testpad at the other board side
5 HDMI_VCC2 / +3.3V_ANA ? Connected to HDMI controller MN8647091 pin 25 (and a lot more pins). It have a testpad at the other board side
6 GND Ground (this pin also dissipates heat to the circuit board ground layer)
7 HDMI_EN Connected to SW2-30x pin 119
Connected to HDMI connector pin 18 (+5V output) through a transistor
8 5V_EVER Connected to Power Supply control connector (CN101) pin 1

Mitsumi 810X (RSX RAM)[edit]

Mitsumi voltage regulator 810x
Pin # Name Description
1 RSX_VDDR connected to a lot of pads of the RSX, it has a testpad at the other board side
2 N/C Not connected
3 GND Ground
4 NOISE_CAP Noise decrease pin. 0.01μF capacitor to GND, and to a tiny squared testpad
5 EN ?/Cont/Control Connected to syscon pin75@SW2-303
6 N/C Not connected
7 N/C Not connected
8 VIN connected to 2x sinkholes

D35653 0S25[edit]

Next to NOR, on top of the board JSD-001, responsible of the NOR VCC

Pin # Name Description
1 OUT/NOR ? capacitor and 180 ohm resistor to ground... then to 4 sinkholes and at the other side NOR VCC 3.3v (testpoint)
2 GND
3 GND
4 ? Capacitor to ground
5 EN ? Connected to pin50@SW2-303. And pin 3 @ Service Connector
6 GND
7 GND
8 VCC ? To fuse/thermistor TH7601

BD9684 0906[edit]

Pin # Name Description
1 ? sealed coil... then to 8 sinkholes... to BD controller, etc...
2 ? dissapears under package
3 VCC ? 0.400mf capacitor to ground, and to fuse/thermistor TH7601
4 EN ? to a sinkhole... at the other side 3.3K resistor to ground, then connected to pins 2 and 3 of a dual transistor (base of TR1, and collector of TR2)
pin 5 of the dual transistor (base of TR2) is connected to a long trace that dies in a sinkhole and emerges under syscon, connected to pin42@SW2-303
the emitter pins of the dual transistor (1 and 4) are connected to a common ground
5 GND
6 GND
7 dissapears under package
8 VCC ? 0.400mf capacitor to ground, and to fuse/thermistor TH7601
9 ? dissapears under package
10 ? sealed coil... then tied to pin 11
11 ? to 6 sinkholes... at the other side to unpopulated service connector... etc...
12 ? Capacitor to ground, to a 4x-sinkhole... then to BD controller
13
14 GND
15 ? to a sinkhole... at the other side to BD controller
16 ? dissapears under package
17 VCC ? 0.400mf capacitor to ground, and to fuse/thermistor TH7601
18 ? towards blu ray laser connector
19 ? tied to pin 1
20 ? to a sinkhole... then to pin 6 of the same dual transistor (collector of TR1)

Rohm BD3525[edit]

BD3525 pinout
Pin # Name Description Connections
1 OUT Output voltage To 4 sinkholes... at the other side to electrolitic capacitor 2.5v 330... and to ???
2
3
4
5
6 VOS Output voltage control Shorten with OUT pins
7 FB Reference voltage feedback Diode to ground, and capacitor to ground, and diode to 55.8 ohm resistor to OUT pins
8 NRCS Non Rush Current on Start-up Capacitor to ground
9 GND Ground
10 GND Ground
11 VCC Power supply To fuse/thermistor TH7601
12 EN Enable input 46Kohm resistor to ground, and a trace that dissapears in a sinkhole and emerges near syscon, connected to pin52@SW2-303
13 SCP Short Circuit Protection delay time setting Capacitor to ground
14 VD Input voltage detect Shorten with IN pins
15 IN Input voltage 0.400mf capacitor to ground, to 4 sinkholes connected to BD3527 (near usb) pins 14 up to 20 and BD3527 (near flash) pins 14 up to 20... and to ???
16
17
18
19
20

Rohm BD3527[edit]

There are 2 BD3527 on JSD-001 motherboard, one is located near flash and the other near usb connectors


BD3527 (near flash) pinout
Pin # Name Description Connections
1 OUT ? Output voltage ? to 3 smd components to gnd, to electrolitic capacitor 2.5v 330, to 3 sinkholes with a testpoint at the other side
2
3
4
5
6 VOS ? Output voltage control ? Shorten with OUT pins
7 FB ? Reference voltage feedback ? Capacitor and 1600 ohm resistor to OUT pins
8 NRCS ? Non Rush Current on Start-up ? Capacitor? to ground
9 GND Ground
10 GND Ground
11 VCC ? Power supply ? To fuse/thermistor TH7601
12 EN ? Enable input ? dissapears in a sinkhole (resistor 23Kohm to ground in the other side) and emerges near syscon, connected to pin95@SW2-303
13 SCP ? Short Circuit Protection delay time setting ? dissapears in a sinkhole (capacitor 915nf to ground in the other side)
14 VD ? Input voltage detect ? Shorten with IN pins
15 IN ? Input voltage ? to 3 sinkholes missing at the other side, to 4 sinkholes connected to BD3525 pins 14 up to 20... and to ???
16
17
18
19
20
BD3527 (near USB) pinout
Pin # Name Description Connections
1 OUT ? Output voltage ? 88 ohm resistor to ground, to a testpoint, to 4 sinkholes and to the other side to electrolitic capacitor 2.5v 330 (very close to a ram chip)
2
3
4
5
6 VOS ? Output voltage control ? Shorten with OUT pins
7 FB ? Reference voltage feedback ? capacitor and 1600 ohm resistor to OUT pins
8 NRCS ? Non Rush Current on Start-up ? Capacitor? to ground
9 GND Ground
10 GND Ground
11 VCC ? Power supply ? To fuse/thermistor TH7601
12 EN ? Enable input ? 42k ohm resistor to ground, and to a sinkhole that dissapears in the other side and emerges near syscon, connected to pin92@SW2-303
13 SCP ? Short Circuit Protection delay time setting ? 1000nf capacitor to ground
14 VD ? Input voltage detect ? Shorten with IN pins
15 IN ? Input voltage ? capacitor to ground, to 4 sinkholes missing in the other side, connected to BD3525 pins 14 up to 20 ... and to ???
16
17
18
19
20

Others[edit]

  • RSX VDDR control in DIA-001 ---> Rohm D35231 (1,2v)?, see 1
  • RSX VDDR control in DIA-002 ---> Rohm D35230 (1,0v)?, see 1