Philips Semiconductors
Product specification
0.95 V starting basic power unit
CONTENTS
1
2
3
4
5
6
7
7.1
7.2
8
8.1
8.2
8.3
8.4
8.5
8.6
8.7
8.8
8.9
8.10
8.11
8.12
9
10
11
12
13
13.1
14
15
15.1
15.2
15.3
15.4
15.5
16
17
18
FEATURES
APPLICATIONS
GENERAL DESCRIPTION
ORDERING INFORMATION
QUICK REFERENCE DATA
BLOCK DIAGRAM
PINNING INFORMATION
Pinning
Pin description
FUNCTIONAL DESCRIPTION
Control mechanism
Synchronous rectification
Start-up
Undervoltage lockout
Shut-down
Power switches
Temperature protection
Current limiters
External synchronization and PWM-only mode
Behaviour at input voltage exceeding the
specified range
Control of the additional switch
Low battery detector
LIMITING VALUES
THERMAL CHARACTERISTICS
QUALITY SPECIFICATION
CHARACTERISTICS
APPLICATION INFORMATION
External component selection
PACKAGE OUTLINE
SOLDERING
Introduction to soldering surface mount
packages
Reflow soldering
Wave soldering
Manual soldering
Suitability of surface mount IC packages for
wave and reflow soldering methods
DATA SHEET STATUS
DEFINITIONS
DISCLAIMERS
TEA1201TS
2002 Jun 06
2
Philips Semiconductors
Product specification
0.95 V starting basic power unit
1
FEATURES
3
GENERAL DESCRIPTION
TEA1201TS
•
Complete DC-to-DC converter circuit, one current
switch and a battery low detector
•
Configurable for 1, 2 or 3-cell Nickel-Cadmium (NiCd)
or Nickel Metal Hydride (NiMH) batteries and 1 Lithium
Ion (Li-Ion) battery
•
Guaranteed DC-to-DC converter start-up from 1-cell
NiCd or NiMH battery, even with a load current
•
Upconversion or downconversion
•
Internal power MOSFETs featuring a low R
DSon
of
approximately 0.1
Ω
•
Synchronous rectification for high efficiency
•
Soft start
•
PWM-only operating option
•
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
µm
BICMOS process.
2
APPLICATIONS
The TEA1201TS is a fully integrated battery power unit
including a high-efficiency DC-to-DC converter which runs
from a 1-cell NiCd or NiMH battery, a current switch and a
low battery detector. The circuit can be arranged in several
ways to optimize the application circuit of a power supply
system. Therefore, the DC-to-DC converter can be
arranged for upconversion or downconversion 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-to-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
DSon
and fully
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).
The switch can be used to control the connection of (a part
of) the output load. It shows a low pin-to-pin resistance of
500 mΩ.
The low battery detector has a built-in detection level
which is optimum for a 1-cell NiCd or NiMH battery.
•
Cellular phones
•
Cordless phones
•
Personal Digital Assistants (PDAs)
•
Portable audio players
•
Pagers
•
Mobile equipment.
4
ORDERING INFORMATION
TYPE
NUMBER
TEA1201TS
PACKAGE
NAME
SSOP16
DESCRIPTION
plastic shrink small outline package; 16 leads; body width 4.4 mm
VERSION
SOT369-1
2002 Jun 06
3
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