ML9078-001 Datasheet, PDF (1/19 Pages) List of Unclassifed Manufacturers – LSI for power-saving solar power supply control

ML9078-001
LSI for power-saving solar power supply control
FEDL9078-001-01
Issue Date: Jan.30, 2012
„ Outline
ML9078-001 is power supply control LSI which performs selection control for a solar cell power supply and a primary
battery. This LSI consists of a direct switch circuit and a regulator circuit, and each circuit performs the following
operations.
● Direct switch circuit
- Primary battery side direct switch circuit (BAT_DIRECT)
x This always compare the primary battery side voltage (V_BAT) with the output voltage (VDO) of
ML9078-001. In case V_BAT>VDO, a primary battery side direct switch will be set to ON and the primary
battery side voltage (V_BAT) is supplied to the output voltage (VDO).
- Solar cell side direct switch circuit (SC_DIRECT)
x This always compare the solar cell side voltage (V_SC) with the output voltage (VDO) of ML9078-001. In
case V_SC>VDO, a solar cell side direct switch will be set to ON and the primary battery side voltage (V_SC)
is supplied to the output voltage (VDO).
● Regulator circuit
x The solar cell side voltage (Vsc) will be limited to be 1.65V(typ) or 3.3V(typ).
„ Feature
● Comparison of primary battery power supply voltage (V_BAT) and solar cell power supply voltage (V_SC) is performed,
and the power supply source is selected automatically.
- When primary battery voltage (V_BAT) is higher than solar cell voltage (V_SC), it outputs primary battery voltage
(V_BAT) to the output terminal (VDO) of ML9078-001.
- When solar cell voltage (V_SC) is higher than primary battery voltage (V_BAT), it outputs solar cell voltage (V_SC) to
the output terminal (VDO) of ML9078-001.
● The adverse current from a solar cell to a primary battery is prevented.
- When primary battery voltage is low, the direct switch by the side of a primary battery turns off. The adverse
current to a primary battery from a solar cell is prevented, and the primary battery destruction by the adverse
current from a solar cell to a primary battery can be prevented.
● Direct power supply from whether a solar cell output or a primary battery output to the external LSI is available. (at
the time of SCREG=L)
● The regulator output voltage is selectable by the external input. (at the time of SCREG=H)
- In case SCLV=L : regulator output voltage(V_LD) will be limited to be 1.65V(typ) (V_SC>=2V, I_SC<=0.1mA, 25 °C
conditions)
- In case SCLV=H : regulator output voltage(V_LD) will be limited to be 3.3V(typ) (V_SC>=3.6V, I_SC<=0.8mA, 25 °C
conditions)
● Low power operation
- Primary-battery side consumption current: Max 80nA at 25°C
- SCREG=L,SCLV=X,Solar-cell side consumption current: Max 80nA at 25°C
- SCREG=H,SCLV=L,Solar-cell side consumption current: Max 250nA at 25°C
- SCREG=H,SCLV=H,Solar-cell side consumption current: Max 1200 nA at 25°C
● A monitor of the use situation of a solar panel is possible.
- In case DI_MONI=H, current is supplied from solar cell to external circuit.
- In case DI_MONI=L, current is supplied from primary battery to external circuit.
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