  In this talk I discuss some aspects of the phenomenology of a moderately
light charged Higgs ($H^\pm$) with a mass $\gts 130$ GeV, lighter than the top
quark, at the LHC. A charged Higgs in this mass range is still allowed in
next-to-minimal Supersymmetric Standard Model (NMSSM) at low $\tan \beta$ as
well as in CP-violating (\cp) Minimal Supersymmetric Standard Model (MSSM) for
a certain choice of \cp parameters, still respecting all the LEP-II bounds. In
both the cases, the $H^\pm$ has a large branching ratio in the $W^\pm \phi$
channel, where $\phi$ denotes a generic Higgs which is dominantly pseudoscalar
and hence may be substantially lighter than the LEP-II mass bound. This $\phi$
decays dominantly into a $b \bar b$ pair. Thus production of $H^\pm$ in the top
decay gives a striking $t \bar t$ signal at the LHC, where one of the top
quarks decays into the $bb \bar b W$ channel, via $t \to b H^\pm, H^\pm \to
\phi$ and $\phi \to b \bar b$. The characteristic correlation between the $b
\bar b$, $b \bar b W$ and $b b \bar b W$ invariant mass peaks helps reduce the
Standard Model (SM) background very effectively. For these low values of $\tan
\beta$ the $H^\pm \to \tau \nu_\tau $ channel does not provide any reach for
the $H^\pm$. Thus this is a signal for both a light charged $H^\pm$ and a light
$\phi$, which is mostly pseudoscalar in nature and decays dominantly into a $b
\bar b$ pair.
