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PDF TEA1211 Data sheet ( Hoja de datos )

Número de pieza TEA1211
Descripción High efficiency auto-up/down DC/DC converter
Fabricantes NXP Semiconductors 
Logotipo NXP Semiconductors Logotipo



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No Preview Available ! TEA1211 Hoja de datos, Descripción, Manual

INTEGRATED CIRCUITS
DATA SHEET
TEA1211HN
High efficiency auto-up/down
DC/DC converter
Preliminary specification
Supersedes data of 2003 Aug 06
2003 Oct 13

1 page




TEA1211 pdf
Philips Semiconductors
High efficiency auto-up/down
DC/DC converter
handbook, halfpage
n.c. 8
GND 7
n.c. 6
GND 5
LXA 4
LXA 3
IN 2
LXA 1
TEA1211HN
17 n.c.
18 GND
19 n.c.
20 GND
21 LXB
22 LXB
23 OUT
24 LXB
MDB002
Preliminary specification
TEA1211HN
This diagram is a bottom side view.
Pin 1 is indicated with a dot on the top side of the package.
For mechanical details of HVQFN32 package, see Chapter 12.
Fig.2 Pin configuration.
7 FUNCTIONAL DESCRIPTION
7.1 Introduction
The TEA1211HN is able to operate in Pulse Frequency
Modulation (PFM) or discontinuous conduction mode as
well as in Pulse Width Modulation (PWM) or continuous
conduction mode. All switching actions are completely
determined by a digital control circuit which uses the
output voltage level as control input. This digital approach
enables the use of a new pulse width and frequency
modulation scheme, which ensures optimum power
efficiency over the complete range of operation of the
converter.
7.2 Control mechanism
Depending on load current Iload and VIN to VOUT ratio, the
controller chooses a mode of operation. When high output
power is requested, the device will operate in PWM
(continuous conduction) mode, which is a 2-phase cycle in
up- as well as in down mode. For small load currents the
controller will switch over to PFM (discontinuous mode),
which is either a 3- or 4-phase cycle depending on the
input to output ratio, see Fig.3.
handbook, halfpage
Icoil
PWM
PFM
0
VIN > VOUT
down mode
VIN = VOUT
stationary mode
VIN < VOUT
up mode
MDB003
Fig.3 Waveform of coil current as function of Iload
and VIN to VOUT ratio.
2003 Oct 13
5

5 Page





TEA1211 arduino
Philips Semiconductors
High efficiency auto-up/down
DC/DC converter
Preliminary specification
TEA1211HN
7.12.5.3 Write Cycle
The I2C-bus configuration for the different TEA1211HN write cycles is shown in Fig.10. The word address is an eight bit
value that defines which register is to be accessed next.
handbook, full pagewidth
acknowledgement
from slave
acknowledgement
from slave
acknowledgement
from slave
R/W
S SLAVE ADDRESS 0 A WORD ADDRESS A
DATA
AP
S = START condition.
P = STOP condition.
n bytes
auto increment
memory word address
MDB010
Fig.10 Master transmits to slave receiver (write mode).
8 LIMITING VALUES
SYMBOL
Vn
Ptot
Tj
Tamb
Tstg
Vesd
PARAMETER
voltage on any pin with respect
to GND
total internal power dissipation
junction temperature
ambient temperature
storage temperature
electrostatic discharge voltage
pins LXA
all other pins
CONDITIONS
shut-down mode
operational mode
note 1
note 2
JEDEC Class II; note 1
JEDEC Class II; note 2
MIN.
0.5
0.5
40
40
40
MAX.
+6.0
+5.5
1 000
+150
+85
+125
− ±800
− ±200
− ±2000
− ±200
Notes
1. Human Body Model: equivalent to discharging a 100 pF capacitor via a 1.5 kresistor.
2. Machine Model: equivalent to discharging a 200 pF capacitor via a 0.75 µH series inductor.
UNIT
V
V
mW
°C
°C
°C
V
V
V
V
9 THERMAL CHARACTERISTICS
SYMBOL
Rth(j-a)
PARAMETER
CONDITIONS
thermal resistance from junction mounted on dedicated PCB in
to ambient
free air
VALUE
35
UNIT
K/W
2003 Oct 13
11

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