TEA1202 Philips Semiconductors, TEA1202 Datasheet - Page 2

• Manufacturer Part Number: TEA1202
• Description: Battery power unit
• Manufacturer: Philips Semiconductors

Philips Semiconductors
FEATURES
APPLICATIONS
ORDERING INFORMATION
2000 Jun 08
TEA1202TS
Fully integrated battery power unit, including complete
DC/DC converter circuit, two Low DropOut voltage
regulators (LDOs) and a battery low detector
Configurable for 1, 2 or 3-cell Nickel-Cadmium (NiCd)
or Nickel Metal Hybrid (NiMH) batteries and 1 Lithium
Ion (Li-Ion) battery
Guaranteed DC/DC converter start-up from 1-cell NiCd
or NiMH battery, even with an load current
Upconversion or downconversion
Internal power MOSFETs featuring a low R
approximately 0.1
Synchronous rectification for high efficiency
Soft start
PWM-only operating option
Dropout voltage of 75 mV at 50 mA
Both LDOs are also applicable as low-ohmic power
switches
Stable LDO performance with ceramic capacitors
Stand-alone low battery detector requires no additional
supply voltage
Low battery detection level at 0.90 V, externally
adjustable to a higher level
Adjustable output voltages
Shut-down function
Small outline package
Advanced 0.6 m BICMOS process.
Cellular phones
Cordless phones
Personal Digital Assistants (PDAs)
Portable Audio Players
Pagers
Mobile equipment.
Battery power unit
NUMBER
TYPE
SSOP20
NAME
plastic shrink small outline package; 20 leads; body width 4.4 mm
DSon
of
2
DESCRIPTION
GENERAL DESCRIPTION
The TEA1202TS is a fully integrated battery power unit
including a high-efficiency DC/DC converter which runs
from a 1-cell NiCd or NiMH battery, two low dropout
voltage regulators and a low battery detector. The circuit
can be arranged in many ways to optimize the application
circuit of a power supply system. Therefore, most inputs
and outputs are separated, the DC/DC converter can be
arranged for upconversion or downconversion and the
regulators can also be used as power switches. One
regulator can be used completely independent of the rest
of the system, and the low battery detector can be
configured for several types of batteries. Accurate low
battery detection is possible while all other blocks are
switched off.
The DC/DC converter features efficient, compact and
dynamic power conversion using a digital control concept
comparable with Pulse Width Modulation (PWM) and
Pulse Frequency Modulation (PFM), integrated CMOS
power switches with a very low R
synchronous rectification.
The device operates at a switching frequency of 600 kHz
which enables the use of external components with
minimum size. The switching frequency can be
synchronized to an external high frequency clock signal.
Optionally, the device can be kept in PWM control mode
only. Deadlock is prevented by an on-chip undervoltage
lockout circuit.
Active current limiting enables efficient conversion in
pulsed-load systems such as Global System for Mobile
communication (GSM) and Digital Enhanced Cordless
Telecommunications (DECT).
Both LDOs show a low dropout voltage and are inherently
stable, even when ceramic capacitors with a low ESR
value are applied at the outputs. Usage of the LDOs as
low-ohmic switches is also possible.
The low battery detector has a built-in detection level
which is optimum for a 1-cell NiCd or NiMH battery. Higher
battery voltages can be translated to this 1-cell level by an
additional built-in LDO circuit.
PACKAGE
Objective specification
DSon
TEA1202TS
and fully
SOT266-1
VERSION