TLD5098EL Infineon Technologies, TLD5098EL Datasheet - Page 16

• 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

7
7.1
The enable function powers ON or OFF the device. A valid logic LOW signal on enable pin EN/PWMI powers OFF
the device and current consumption is less than I
enable pin EN/PWMI powers on the device. The enable function features an integrated pull down resistor which
ensures that the IC is shut down and the power switch is OFF in case the enable pin EN is left open.
In addition to the enable function described above, the EN/PWMI pin detects a pulse width modulated (PWM) input
signal that is fed through to an internal gate driver. The internal gate driver outputs the same PWM signal on the
PWMO pin to an external N-channel enhancement mode MOSFET for PWM dimming an LED load. PWM dimming
an LED is a commonly practiced dimming method and can prevent color shift in an LED light source. Moreover
the PWM output function may also be used to drive other types of loads besides LED.
The enable and PWM input function share the same pin. Therefore a valid logic LOW signal at the EN/PWMI pin
needs to differentiate between an enable power OFF or an PWM dimming LOW signal. The device differentiates
between enable OFF and PWM dimming signal by requiring the enable OFF at the EN/PWMI pin to stay LOW for
the Enable Turn OFF Delay Time (t
Figure 6
Datasheet
Microcontroller
Enable and Dimming Function
Description
Block Diagram and Simplified Application Circuit Enable and LED Dimming
EN / PWMI
IN
14
13
Enable / PWMI
EN,OFF,DEL
Logic
Parameter 7.2.6).
Enable
Enable
PWMI
q_OFF
16
(Parameter 7.2.14). A valid logic HIGH enable signal on
LDO
Driver
Gate
Driver
Gate
Enable and Dimming Function
1
2
5
IVCC
SWO
PWMO
Rev. 1.0, 2010-10-13
TLD5098EL