TDA16888GNK Infineon Technologies, TDA16888GNK Datasheet - Page 11

• Manufacturer Part Number: TDA16888GNK
• Manufacturer: Infineon Technologies

Specifications of TDA16888GNK

• Start-up Supply Current: 50uA
• Switching Freq: 200kHz
• Operating Supply Voltage (min): 11V
• Operating Supply Voltage (max): 19V
• Operating Temp Range: -25C to 125C
• Operating Temperature Classification: Commercial
• Package Type: DSO
• Pin Count: 20
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

TDA 16888
The pulse-width-modulation of the PWM section is trailing edge modulated according to
V
V
the PWM ramp signal
at pin 15 (PWM RMP) and the input voltage
at
PWM RMP
PWM IN
pin 14 (PWM IN) (see Figure 18). In contrast to the PFC section, however, the pulse-
width-modulation of the PWM section is trailing edge triggered with respect to the
internal clock reference CLK OUT in order to avoid undesirable electromagnetic
interference of both sections. Moreover the maximum duty cycle of the PWM is limited
to 50% to prevent transformer saturation.
By means of the above mentioned improved current mode control a stable pulse-width-
modulation from maximum load down to no load is achieved. Finally, in case of no load
conditions the PWM section may as well be disabled by shorting pin 13 (PWM SS) to
ground.
Version 2.0
11
28 Feb 2000