Datasheet

Datasheet

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BU1840AMUV

TSZ02201-0Q1Q0AJ00130-1-2

© 2012 ROHM Co., Ltd. All rights reserved.

2.AUG.2012 Rev.001

TSZ22111・15・001

www.rohm.com

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Block diagram

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Block Operation Characteristics

DET1：The voltage of VINMON is detected. (It has hysteresis characteristics.)

0.700V-DETECT

0.625V-RELEASE

DET2：The voltage of COREVDD (2.6V) is detected. (It has hysteresis characteristics.)

2.6V-DETECT

2.3V-RELEASE

DET3：The voltage of V18 is detected. (It has hysteresis characteristics.)

1.6V-DETECT

1.5V-RELEASE

DET4：The voltage of OUTS is detected. (It has hysteresis characteristics.)

5.0V-DETECT

4.925V-RELEASE

OSC1：It is an oscillator. It operates at the self-excitation boost.

OSC2：It is an oscillator. It operates at MPPT.

SEL= GND：frequency=160kHz

SEL= VIN ：frequency=320kHz

OSC3：It is an oscillator. It uses it for the clock in the MPPT-CONTROL Block and the A/D Block.

DAC ：It is D/A converter. A standard voltage of MPPT is output.

ADC ：It is A/D converter. The analogue signal amplified in the Current-Sense block is converted into the digital signal.

Current-Sense：The OUTPM-OUTS voltage is amplified.

V18REG：Internal power supply V18 is generated from COREVDD.

Current-limiter：The current that flows from SW to PGND is detected.

I2C：It is I2C interface block. VIO is made a power supply.

MPPT-Control：To charge it by the solar battery maximum dissipation, it controls.

DCDC

Control

ENB

+

-

VINMON

PCOMP

SWN

PGND1,2,3

SW1,2,3

SWP

OUTP1,2

DET4

(5V)

VIN

OUTS

500k

+

-

COREVDD

Current

limiter

AGND1,2

Current

Sense

IMON

SEL

I2C

VIO

SDA SCL

OUTPM

DAC

OSC3

OSC

V18

VIN

500k

ADC

DET1

0.7V

OSC2

V18REG

DET2

(2.6V)

DET3

(1.6V)

ADCOUT

OSC3OUT

MMPT

Control

DACOUT

OSC1OUT

DET3OUT

OSC2OUT

(160kHz, 320kHz)

DET4OUT

DET2OUT

VIN

OSC1