ST890CD

Voltage - Supply (Vcc/Vdd):	Not Required
Base Part Number:	ST890
Supplier Device Package:	8-SO
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Fault Protection:	Current Limiting (Adjustable), Over Temperature
Features:	--
Input Type:	Non-Inverting
Rds On (Typ):	75 mOhm
Current - Output (Max):	1.2A
Series:	--
Voltage - Load:	2.7 V ~ 5.5 V
Interface:	On/Off
Output Type:	P-Channel
Output Configuration:	High Side
Ratio - Input:Output:	1:1
Number of Outputs:	1
Switch Type:	General Purpose
Part Status:	Obsolete
Packaging:	Tube

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ST890CD Application Field and Working Principle

The ST890CD is an advanced programmable battery power management integrated circuit (PMIC). It is an important component of the battery power distribution system and has a wide range of applications. This article will discuss the application field and working principle of the ST890CD in detail.

Application Field

The ST890CD is designed for use in portable devices, such as mobile phones, digital cameras, personal digital assistants (PDAs), and portable media players. It is a single-chip power management IC and is suitable for powering single-cell Li-Ion, Li-Poly, Li-Fe and other single-cell Li of 3/3.3 V battery. Through the integrated and multiple voltage regulators, the ST890CD provides multiple power management functions and integrates a wide range of power management peripherals including the battery charger, power management switch, load drivers, and power path management.

Working Principle

The ST890CD has an integrated, low-power and high-precision current sense amplifier, which is used to sense the voltage from the battery and control the load current. The programmable power switch controllers a wide range of load current through the associated switch, which can be controlled by the power management unit. The integrated load drivers are used to drive the power switch, and are highly efficient and low noise. The ST890CD also integrates a low ESR NiMH battery charger, which can be programmed to provide charging currents of up to 1500mA.

Conclusion

The ST890CD is an advanced PMIC and is an essential component of battery power distribution systems. It provides multiple power management functions, such as battery charging, power path management, and load drivers. Its programmable power switch and efficient load drivers make it suitable for use in a wide range of portable devices, such as mobile phones, digital cameras, and PDAs.

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