HM70 series
Low Power Voltage Detector
HM7050
Malfunction Analysis
The following circuit demonstrates the
way a circuit analyzes malfunctions by
monitoring the variation or spike noise
of power supply voltage.
HM70XXPR
Change of Detectable Voltage
If the required voltage is not found in
the standard product selection table, it
is possible to change it by using
external resistance dividers or diodes.
Varying the detectable voltage with a
resistance divider
HM70XXPR
Charge Monitoring Circuit
The following circuit shows a charged
monitor for protection against battery
deterioration by overcharging. When
the voltage of the battery is higher than
the set detectable voltage, the
transistor turns onto bypass the charge
current, protecting the battery from
overcharging.
HM70XXPR
HM70XXPR
Varying the detectable voltage with a
diode
HM70XXPR
Level Selector
The following diagram illustrates a logic level selector.
Ver1.1
6
Oct 3,2011
Shenzhen H&M Semiconductor Co.Ltd
http://www.hmsemi.com