TLD5098EL Infineon Technologies, TLD5098EL Datasheet - Page 25

• Manufacturer Part Number: TLD5098EL
• Description: IC DC-DC CTRLR BUCK BOOST 14SSOP
• Manufacturer: Infineon Technologies

Specifications of TLD5098EL

• Constant Current: Yes
• Constant Voltage: Yes
• Internal Driver: No
• Type - Primary: Automotive
• Mounting Type: Surface Mount
• Topology: PWM, SEPIC, Step-Down (Buck), Step-Up (Boost)
• Number Of Outputs: 1
• Frequency: 100kHz ~ 500kHz
• Voltage - Supply: 4.5 V ~ 45 V
• Voltage - Output: 4.5 V ~ 5.5 V
• Package / Case: 14-LSSOP (0.150", 3.95mm Width) Exposed Pad
• Packages: PG-SSOP-14
• Vs (min): 4.75 V
• Vs (max): 45.0 V
• Vq (max): -
• Iq (max): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Lead Free Status / Rohs Status: Details

Figure 14
Short to GND protection for Highside Return Applications (B2B) from
The FBH and FBL pins features a Short to GND detection threshold (V
below this threshold the Device stops his operation. This means that the PWMO signal changes to inactive state
(LOW potential) and the corresponding p-channel (T
For the B2B application some external components are needed to ensure a LOW potential during a short circuit
event. D1 and D2 are low power diodes (BAS16-03W) and the resistor R
through this path. The diode D3 should be a high power diode and is needed to protect the R
FBL pins in case of an short circuit to GND event. This short circuit detection and protection concept considers
potential faults for LED chains (LED Modules) which are separated from the ECU via two wires (at the beginning
and at the end of the LED chain). If the short circuit condition disappears, the device will re-start with an soft start.
Figure 15
Datasheet
V
bb
TLD5098
C
IN
GND
12
Overvoltage Protection description
Short Circuit to GND Protection
example: V
D1
D3
OVFB
Rlim
R
FB
Short to GND
T
9
DIM1
1.25mA
OUT,max=40V
R
R
OVH
harness
OVL
wire
1kΩ
IN
PWMO
FBH
FBL
D
LED Module
D2
n
. 1
40
25
V
mA
1.25V
C
D
Short to GND
BO
1
≅
SWCS
33
SGND
harness
SWO
wire
2 .
DIM2
L
k
BO
Ω
25
) is switched OFF accordingly and protects the LED chain.
T
I
DIM2
SW
D
V
V
BO
T
V
SW
OVP,max
OVFB,TH
OVFB
V
I
LED
OUT
FBL,FBH_S2G
V
lim
Overvoltage Protection is
V
FBL,FBH_S2G
Protection and Diagnostic Functions
Overvoltage Protection
(10kOhm) is needed to limit the current
FBL,FBH
Figure 23
4.5V
60V
). If the potential on those pins is
disabled
ACTIVE
Short Circuit detected on
Device working with parameter
Normal Operation
FBH/FBL
Rev. 1.0, 2010-10-13
deviations
FB
and the FBH and
TLD5098EL
1.25V
t
t