TLE 8386-2EL Infineon Technologies, TLE 8386-2EL Datasheet - Page 9

• Manufacturer Part Number: TLE 8386-2EL
• Manufacturer: Infineon Technologies

Specifications of TLE 8386-2EL

• Packages: PG-SSOP-14
• Comment: LS-sense-booster (prefered as voltage source);Can be used in SEPIC- or FLYBACK-configuration as wellMax. output current dependent on output voltage.
• Vq (max): adj (max 9-times of VS)
• Iq (max): -
• Iq (typ): 7,000.0 µA
• Output: Boost Converter

5
5.1
The TLE8386-2 boost (step-up) regulator provides a higher output voltage than input voltage. The PWM controller
measures the output voltage via a resistor divider connected between Pin FB and ground, and determines the
appropriate pulse width duty cycle (on time). An over voltage protection switches off the converter case if the
voltage at Pin FB exceeds the over voltage limit. If the connection to the output voltage resistor divider should be
lost, an internal current source connected to Pin FB will draw the voltage above this limit and shut the external
MOSFET off. The current mode controller has a built-in slope compensation to prevent sub-harmonic oscillations
which is a characteristic of current mode controllers operating at high duty cycles (>50% duty). An additional built-
in feature is an integrated soft start that limits the current through the inductor and the external power switch during
initialization.
The soft-start time T
The switching frequency may be adjusted by using an external resistor (please refer to chapter Oscillator and
Synchronization). If synchronization to an external frequency source is used, the internal frequency has to be
adjusted close to this external source.
Figure 3
Data Sheet
COMP
SYNC
FREQ
SST
Boost Regulator
Description
10
11
Boost Regulator Block Diagram
5
8
Soft Start
SS
Synchroni
Oscillator
Comp.
zation
Slope
is adjustable using an external capacitor C
T
PWM Curr
Comparator
SS
S
R
=
/Q
Q
C
SST
Sensor
Temp.
9
Start
Soft
2 00V
-------------- -
10 A
,
Boost_Diag .vsd
gm
SST
EA
Logic
:
Over Voltage
Comparator
Current Sense
OTA
Feedback Error
Amplifier
V
+
-
IVCC
D
Driver
Gate
V
OVFB,TH
V
Ref
Rev. 1.0, 2010-10-25
3
4
6
2
Boost Regulator
TLE8386-2EL
SWO
SWCS
SGND
FB